diff --git a/ext/flac/Makefile.am b/ext/flac/Makefile.am
index 8be420154b..be66e70b4e 100644
--- a/ext/flac/Makefile.am
+++ b/ext/flac/Makefile.am
@@ -2,7 +2,7 @@
 plugin_LTLIBRARIES = libgstflac.la
 
 libgstflac_la_SOURCES = gstflac.c gstflacenc.c gstflacdec.c gstflactag.c
-libgstflac_la_CFLAGS = $(GST_CFLAGS)
+libgstflac_la_CFLAGS = $(GST_CFLAGS) -I$(top_srcdir)
 libgstflac_la_LIBADD = $(FLAC_LIBS) 
 libgstflac_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)