diff --git a/src/Makefile.am b/src/Makefile.am
index ceb3eba2560c7c0c58f329b2c778e317af3153b0..44de2b694057a8770639daec6ab422d8e89589a5 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