diff --git a/src/FbTk/Makefile.am b/src/FbTk/Makefile.am
index 27b1694e..e0fda045 100644
--- a/src/FbTk/Makefile.am
+++ b/src/FbTk/Makefile.am
@@ -54,4 +54,4 @@ libFbTk_a_SOURCES = App.hh App.cc Color.cc Color.hh Command.hh \
 	${xpm_SOURCE} \
 	${xft_SOURCE} \
 	${xmb_SOURCE} \
-	${imlib2_SOURCE}
+	$(imlib2_SOURCE)