diff --git a/ext/gl/Makefile.am b/ext/gl/Makefile.am
index d87f881cc7..2a3cdfec13 100644
--- a/ext/gl/Makefile.am
+++ b/ext/gl/Makefile.am
@@ -78,8 +78,14 @@ libgstopengl_la_SOURCES = \
 
 # check order of CFLAGS and LIBS, shouldn't the order be the other way around
 # (like in AM_CFLAGS)?
-libgstopengl_la_CFLAGS = -I$(top_srcdir)/gst-libs $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
-	$(GST_PLUGINS_BASE_CFLAGS) $(GL_CFLAGS) $(LIBPNG_CFLAGS)
+libgstopengl_la_CFLAGS = \
+	-I$(top_srcdir)/gst-libs \
+	-I$(top_builddir)/gst-libs \
+	$(GST_CFLAGS) \
+	$(GST_BASE_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS) \
+	$(GL_CFLAGS) \
+	$(LIBPNG_CFLAGS)
 
 libgstopengl_la_LIBADD = \
 	$(top_builddir)/gst-libs/gst/gl/libgstgl-$(GST_API_VERSION).la \
diff --git a/gst-libs/gst/gl/Makefile.am b/gst-libs/gst/gl/Makefile.am
index cb41fe0c58..3923259106 100644
--- a/gst-libs/gst/gl/Makefile.am
+++ b/gst-libs/gst/gl/Makefile.am
@@ -98,6 +98,7 @@ nodist_libgstgl_@GST_API_VERSION@include_HEADERS = \
 
 libgstgl_@GST_API_VERSION@_la_CFLAGS = \
 	-I$(top_srcdir)/gst-libs \
+	-I$(top_builddir)/gst-libs \
 	$(GL_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_BASE_CFLAGS) \
diff --git a/gst-libs/gst/gl/wayland/Makefile.am b/gst-libs/gst/gl/wayland/Makefile.am
index 1d5a7171fb..9006e672ac 100644
--- a/gst-libs/gst/gl/wayland/Makefile.am
+++ b/gst-libs/gst/gl/wayland/Makefile.am
@@ -12,6 +12,7 @@ noinst_HEADERS = \
 
 libgstgl_wayland_la_CFLAGS = \
 	-I$(top_srcdir)/gst-libs \
+	-I$(top_builddir)/gst-libs \
 	$(GL_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_BASE_CFLAGS) \
diff --git a/gst-libs/gst/gl/x11/Makefile.am b/gst-libs/gst/gl/x11/Makefile.am
index 9626d84825..c8d9b69b6c 100644
--- a/gst-libs/gst/gl/x11/Makefile.am
+++ b/gst-libs/gst/gl/x11/Makefile.am
@@ -27,6 +27,7 @@ endif
 
 libgstgl_x11_la_CFLAGS = \
 	-I$(top_srcdir)/gst-libs \
+	-I$(top_builddir)/gst-libs \
 	$(GL_CFLAGS) \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_BASE_CFLAGS) \