diff --git a/src/Makefile.am b/src/Makefile.am
index ceb3eba25..44de2b694 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -14,7 +14,7 @@ DISTCHECK_CONFIGURE_FLAGS = --enable-introspection
 #AM_CXXFLAGS =
 
 # Convenience targets:
-lib: libharfbuzz.la
+lib: $(BUILT_SOURCES) libharfbuzz.la
 
 lib_LTLIBRARIES = libharfbuzz.la