diff --git a/plugins/Makefile.mk b/plugins/Makefile.mk
index 721d76a..1feb1f0 100644
--- a/plugins/Makefile.mk
+++ b/plugins/Makefile.mk
@@ -60,7 +60,7 @@ jack: $(jack)
 
 $(jack): $(OBJS_DSP) $(OBJS_UI) $(DISTRHO_PLUGIN_FILES) $(DISTRHO_UI_FILES)
 	mkdir -p $(shell dirname $@)
-	$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(DGL_LIBS) $(shell pkg-config --libs jack libprojectM) -lpthread -DDISTRHO_PLUGIN_TARGET_JACK -o $@
+	$(CXX) $^ $(BUILD_CXX_FLAGS) $(LINK_FLAGS) $(DGL_LIBS) $(shell pkg-config --cflags --libs jack libprojectM) -lpthread -DDISTRHO_PLUGIN_TARGET_JACK -o $@
 
 # --------------------------------------------------------------
 # LV2