--- a/gui/linux-gtk/Makefile
+++ b/gui/linux-gtk/Makefile
@@ -2,14 +2,14 @@
 include $(TOPDIR)/Makefile.inc
 
 # hardening flags: -fPIE -Wl,-z,now -pie
-CFLAGS += $(shell pkg-config --cflags gtk+-2.0) -fPIE -Wno-strict-prototypes \
+CFLAGS += $(shell $(PKG_CONFIG) --cflags glib-2.0 gdk-pixbuf-2.0 gtk+-2.0) -fPIE -Wno-strict-prototypes \
           -Wno-cast-qual
-CPPFLAGS += $(shell pkg-config --cflags gtk+-2.0)
+CPPFLAGS += $(shell $(PKG_CONFIG) --cflags glib-2.0 gdk-pixbuf-2.0 gtk+-2.0)
 LDFLAGS += -pie
 #LDFLAGS +=	-Wl,--warn-common
 
 
-LIBS := $(shell pkg-config --libs gtk+-2.0) -lm
+LIBS := $(shell $(PKG_CONFIG) --libs glib-2.0 gdk-pixbuf-2.0 gtk+-2.0) -lm
 
 # 32/64 cross compilation
 ifdef M32
@@ -30,7 +30,7 @@
 ifeq ($(VERBOSE),0)
 	@echo "[LD] $@"
 endif
-	$(MAKECMDPREFIX)$(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
+	$(MAKECMDPREFIX)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
 
 .PHONY: clean install