diff --git a/Gui/Makefile b/Gui/Makefile
index bb7512fa18..838378d7ee 100644
--- a/Gui/Makefile
+++ b/Gui/Makefile
@@ -2,9 +2,11 @@ include ../config.mak
 
 LIBNAME = libgui.a
 
-CFLAGS = -I../loader -I./wm -I./skin -I../libavutil/
+CFLAGS = -I../loader -I./wm -I./skin
 #CFLAGS += -DDEBUG
 
+CFLAGS-$(CONFIG_LIBAVUTIL)   += -I../libavutil
+
 ifeq ($(TARGET_WIN32),yes)
 SRCS = win32/dialogs.c \
        win32/gui.c \