diff --git a/progs/glsl/Makefile b/progs/glsl/Makefile
index 6af7a665cf1..37ccf8a9eaf 100644
--- a/progs/glsl/Makefile
+++ b/progs/glsl/Makefile
@@ -190,7 +190,7 @@ samplers: samplers.o $(UTIL_OBJS)
 
 
 samplers_array.o: samplers.c $(UTIL_HEADERS)
-	$(APP_CC) $(CFLAGS) -DSAMPLERS_ARRAY $< -c -o $@
+	$(APP_CC) -I$(INCDIR) $(CFLAGS) -DSAMPLERS_ARRAY $< -c -o $@
 
 samplers_array: samplers_array.o $(UTIL_OBJS)