diff --git a/ext/gl/gstglimagesink.c b/ext/gl/gstglimagesink.c
index 89e9f70..c5452e7 100644
--- a/ext/gl/gstglimagesink.c
+++ b/ext/gl/gstglimagesink.c
@@ -100,7 +100,7 @@
 #define DEFAULT_HANDLE_EVENTS       TRUE
 #define DEFAULT_FORCE_ASPECT_RATIO  TRUE
 #define DEFAULT_IGNORE_ALPHA        TRUE
-#define DEFAULT_FULLSCREEN          TRUE
+#define DEFAULT_FULLSCREEN          FALSE
 
 #define DEFAULT_MULTIVIEW_MODE GST_VIDEO_MULTIVIEW_MODE_MONO
 #define DEFAULT_MULTIVIEW_FLAGS GST_VIDEO_MULTIVIEW_FLAGS_NONE