diff --git a/ext/ladspa/Makefile.am b/ext/ladspa/Makefile.am
index 3eefa5bff0..9f0f86a4b3 100644
--- a/ext/ladspa/Makefile.am
+++ b/ext/ladspa/Makefile.am
@@ -2,7 +2,7 @@ plugin_LTLIBRARIES = libgstladspa.la
 
 libgstladspa_la_SOURCES = gstladspa.c
 libgstladspa_la_CFLAGS = \
-	-I$(top_builddir)/gst-libs \
+	-I$(top_srcdir)/gst-libs \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(LRDF_CFLAGS)
 libgstladspa_la_LIBADD = \
diff --git a/ext/lv2/Makefile.am b/ext/lv2/Makefile.am
index 0dbd92f17c..08a5c08ddd 100644
--- a/ext/lv2/Makefile.am
+++ b/ext/lv2/Makefile.am
@@ -2,7 +2,7 @@ plugin_LTLIBRARIES = libgstlv2.la
 
 libgstlv2_la_SOURCES = gstlv2.c
 libgstlv2_la_CFLAGS = \
-	-I$(top_builddir)/gst-libs \
+	-I$(top_srcdir)/gst-libs \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(SLV2_CFLAGS)
 libgstlv2_la_LIBADD = \