diff --git a/pkgconfig/gstreamer-gl-uninstalled.pc.in b/pkgconfig/gstreamer-gl-uninstalled.pc.in
index b4ae6d3067..a426eb4d82 100644
--- a/pkgconfig/gstreamer-gl-uninstalled.pc.in
+++ b/pkgconfig/gstreamer-gl-uninstalled.pc.in
@@ -14,5 +14,5 @@ Version: @VERSION@
 Requires: gstreamer-base-@GST_API_VERSION@ gstreamer-@GST_API_VERSION@
 
 Libs: -L${libdir} -lgstgl-@GST_API_VERSION@
-Cflags: -I@abs_top_srcdir@/gst-libs -I@abs_top_builddir@/gst-libs
+Cflags: -I@abs_top_srcdir@/gst-libs -I@abs_top_builddir@/gst-libs @GL_CFLAGS@