diff --git a/clients/Makefile.am b/clients/Makefile.am
index 5034aa6..c636449 100644
--- a/clients/Makefile.am
+++ b/clients/Makefile.am
@@ -82,6 +82,8 @@ libtoytoolkit_a_SOURCES =			\
 	text-cursor-position-client-protocol.h	\
 	workspaces-protocol.c			\
 	workspaces-client-protocol.h
+libtoytoolkit_a_CPPFLAGS = \
+	$(AM_CPPFLAGS) $(PIXMAN_CFLAGS) $(CAIRO_CFLAGS)
 
 toolkit_libs =						\
 	libtoytoolkit.a					\