diff --git a/ext/pdo_dblib/dblib_driver.c b/ext/pdo_dblib/dblib_driver.c
index d071027e59df0..0a55cc4ff74e0 100644
--- a/ext/pdo_dblib/dblib_driver.c
+++ b/ext/pdo_dblib/dblib_driver.c
@@ -280,16 +280,28 @@ static int dblib_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
 	switch(attr) {
 		case PDO_ATTR_TIMEOUT:
 			return 0;
+
+		case PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER:
+			((pdo_dblib_db_handle *)dbh->driver_data)->stringify_uniqueidentifier = zval_get_long(val);
+			return 1;
+
 		default:
 			return 1;
 	}
-
 }
 
 static int dblib_get_attribute(pdo_dbh_t *dbh, zend_long attr, zval *return_value)
 {
-	/* dblib_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data; */
-	return 0;
+	switch (attr) {
+		case PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER:
+			ZVAL_BOOL(return_value, ((pdo_dblib_db_handle *)dbh->driver_data)->stringify_uniqueidentifier);
+			break;
+
+		default:
+			return 0;
+	}
+
+	return 1;
 }
 
 static struct pdo_dbh_methods dblib_methods = {
@@ -347,6 +359,15 @@ static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options)
 	
 	php_pdo_parse_data_source(dbh->data_source, dbh->data_source_len, vars, nvars);
 
+	H = pecalloc(1, sizeof(*H), dbh->is_persistent);
+	H->login = dblogin();
+	H->err.sqlstate = dbh->error_code;
+	H->stringify_uniqueidentifier = 0;
+
+	if (!H->login) {
+		goto cleanup;
+	}
+
 	if (driver_options) {
 		int connect_timeout = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_CONNECTION_TIMEOUT, -1);
 		int query_timeout = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_QUERY_TIMEOUT, -1);
@@ -361,14 +382,8 @@ static int pdo_dblib_handle_factory(pdo_dbh_t *dbh, zval *driver_options)
 
 		dbsetlogintime(connect_timeout); /* Connection/Login Timeout */
 		dbsettime(query_timeout); /* Statement Timeout */
-	}
 
-	H = pecalloc(1, sizeof(*H), dbh->is_persistent);
-	H->login = dblogin();
-	H->err.sqlstate = dbh->error_code;
-
-	if (!H->login) {
-		goto cleanup;
+		H->stringify_uniqueidentifier = pdo_attr_lval(driver_options, PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER, 0);
 	}
 
 	DBERRHANDLE(H->login, (EHANDLEFUNC) pdo_dblib_error_handler);
diff --git a/ext/pdo_dblib/dblib_stmt.c b/ext/pdo_dblib/dblib_stmt.c
index a1055434d37d7..8ec4f782fd851 100644
--- a/ext/pdo_dblib/dblib_stmt.c
+++ b/ext/pdo_dblib/dblib_stmt.c
@@ -120,7 +120,7 @@ static int pdo_dblib_stmt_cursor_closer(pdo_stmt_t *stmt)
 	dbcancel(H->link);
 
 	pdo_dblib_err_dtor(&H->err);
-	
+
 	return 1;
 }
 
@@ -213,7 +213,7 @@ static int pdo_dblib_stmt_describe(pdo_stmt_t *stmt, int colno)
 	pdo_dblib_db_handle *H = S->H;
 	struct pdo_column_data *col;
 	char *fname;
-	
+
 	if(colno >= stmt->column_count || colno < 0)  {
 		return FAILURE;
 	}
@@ -376,16 +376,28 @@ static int pdo_dblib_stmt_get_col(pdo_stmt_t *stmt, int colno, char **ptr,
 
 					break;
 				}
+
 #ifdef SQLUNIQUE
 				case SQLUNIQUE: {
 #else
 				case 36: { /* FreeTDS hack */
 #endif
-					zv = emalloc(sizeof(zval));
-					ZVAL_STRINGL(zv, data, 16); /* uniqueidentifier is a 16-byte binary number */
+					if (H->stringify_uniqueidentifier) { // 36-char hex string representation
+						tmp_data_len = 36;
+						tmp_data = safe_emalloc(tmp_data_len, sizeof(char), 1);
+						data_len = (unsigned int) dbconvert(NULL, SQLUNIQUE, (BYTE*)data, data_len, SQLCHAR, (BYTE*)tmp_data, tmp_data_len);
+						php_strtoupper(tmp_data, data_len);
+						zv = emalloc(sizeof(zval));
+						ZVAL_STRINGL(zv, tmp_data, data_len);
+						efree(tmp_data);
 
+					} else { // a 16-byte binary representation
+						zv = emalloc(sizeof(zval));
+						ZVAL_STRINGL(zv, data, 16);
+					}
 					break;
 				}
+
 				default: {
 					if (dbwillconvert(coltype, SQLCHAR)) {
 						tmp_data_len = 32 + (2 * (data_len)); /* FIXME: We allocate more than we need here */
@@ -479,4 +491,3 @@ struct pdo_stmt_methods dblib_stmt_methods = {
 	pdo_dblib_stmt_next_rowset, /* nextrow */
 	pdo_dblib_stmt_cursor_closer
 };
-
diff --git a/ext/pdo_dblib/pdo_dblib.c b/ext/pdo_dblib/pdo_dblib.c
index 578be2ee10b1e..b855224c683c8 100644
--- a/ext/pdo_dblib/pdo_dblib.c
+++ b/ext/pdo_dblib/pdo_dblib.c
@@ -179,6 +179,7 @@ PHP_MINIT_FUNCTION(pdo_dblib)
 {
 	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_CONNECTION_TIMEOUT", (long) PDO_DBLIB_ATTR_CONNECTION_TIMEOUT);
 	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_QUERY_TIMEOUT", (long) PDO_DBLIB_ATTR_QUERY_TIMEOUT);
+	REGISTER_PDO_CLASS_CONST_LONG("DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER", (long) PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER);
 
 	if (FAIL == dbinit()) {
 		return FAILURE;
diff --git a/ext/pdo_dblib/php_pdo_dblib_int.h b/ext/pdo_dblib/php_pdo_dblib_int.h
index 01586881d55f1..87a0038ef4cfb 100644
--- a/ext/pdo_dblib/php_pdo_dblib_int.h
+++ b/ext/pdo_dblib/php_pdo_dblib_int.h
@@ -113,6 +113,7 @@ typedef struct {
 	DBPROCESS	*link;
 
 	pdo_dblib_err err;
+	unsigned stringify_uniqueidentifier:1;
 } pdo_dblib_db_handle;
 
 typedef struct {
@@ -142,7 +143,8 @@ ZEND_EXTERN_MODULE_GLOBALS(dblib)
 
 enum {
 	PDO_DBLIB_ATTR_CONNECTION_TIMEOUT = PDO_ATTR_DRIVER_SPECIFIC,
-	PDO_DBLIB_ATTR_QUERY_TIMEOUT
+	PDO_DBLIB_ATTR_QUERY_TIMEOUT,
+	PDO_DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER,
 };
 
 #endif
diff --git a/ext/pdo_dblib/tests/stringify_uniqueidentifier.phpt b/ext/pdo_dblib/tests/stringify_uniqueidentifier.phpt
new file mode 100644
index 0000000000000..79847bf2a194a
--- /dev/null
+++ b/ext/pdo_dblib/tests/stringify_uniqueidentifier.phpt
@@ -0,0 +1,67 @@
+--TEST--
+PDO_DBLIB: Uniqueidentifier column data type stringifying
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo_dblib')) die('skip not loaded');
+require __DIR__ . '/config.inc';
+?>
+--FILE--
+<?php
+require __DIR__ . '/config.inc';
+
+
+$testGUID = '82A88958-672B-4C22-842F-216E2B88E72A';
+$testGUIDBinary = base64_decode('WImogitnIkyELyFuK4jnKg==');
+
+$sql = "SELECT CAST('$testGUID' as uniqueidentifier) as [guid]";
+
+//--------------------------------------------------------------------------------
+// 1. Get and Set the attribute
+//--------------------------------------------------------------------------------
+$db->setAttribute(PDO::DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER, true);
+var_dump(true === $db->getAttribute(PDO::DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER));
+$db->setAttribute(PDO::DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER, false);
+var_dump(false === $db->getAttribute(PDO::DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER));
+
+
+//--------------------------------------------------------------------------------
+// 2. Binary
+//--------------------------------------------------------------------------------
+$stmt = $db->query($sql);
+$row = $stmt->fetch(PDO::FETCH_ASSOC);
+
+var_dump($row['guid'] === $testGUIDBinary);
+
+
+//--------------------------------------------------------------------------------
+// 3. PDO::ATTR_STRINGIFY_FETCHES must not affect `uniqueidentifier` representation
+//--------------------------------------------------------------------------------
+$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);
+$stmt = $db->query($sql);
+$row = $stmt->fetch(PDO::FETCH_ASSOC);
+$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
+
+var_dump($row['guid'] === $testGUIDBinary);
+
+
+//--------------------------------------------------------------------------------
+// 4. Stringifying
+// ! With TDS protocol version <7.0 binary will be returned and the test will fail !
+// TODO: something from PDO::ATTR_SERVER_VERSION, PDO::ATTR_CLIENT_VERSION or PDO::ATTR_SERVER_INFO should be used
+// to get TDS version and skip this test in this case.
+//--------------------------------------------------------------------------------
+$db->setAttribute(PDO::DBLIB_ATTR_STRINGIFY_UNIQUEIDENTIFIER, true);
+$stmt = $db->query($sql);
+$row = $stmt->fetch(PDO::FETCH_ASSOC);
+
+var_dump($row['guid'] === $testGUID);
+var_dump($row['guid']);
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+string(36) "82A88958-672B-4C22-842F-216E2B88E72A"