diff --git a/Zend/zend_extensions.c b/Zend/zend_extensions.c
index bec776e68c8..399186a45d3 100644
--- a/Zend/zend_extensions.c
+++ b/Zend/zend_extensions.c
@@ -109,6 +109,14 @@ int zend_load_extension(const char *path)
 /* See http://support.microsoft.com/kb/190351 */
 #ifdef ZEND_WIN32
 		fflush(stderr);
+#endif
+		DL_UNLOAD(handle);
+		return FAILURE;
+	} else if (zend_get_extension(new_extension->name)) {
+		fprintf(stderr, "Cannot load %s - extension already loaded\n", new_extension->name);
+/* See http://support.microsoft.com/kb/190351 */
+#ifdef PHP_WIN32
+		fflush(stderr);
 #endif
 		DL_UNLOAD(handle);
 		return FAILURE;