added LIBDRM_CFLAGS (Javier Villavicencio)
diff --git a/configs/freebsd-dri b/configs/freebsd-dri
index bce5f01..2ee2112 100644
--- a/configs/freebsd-dri
+++ b/configs/freebsd-dri
@@ -24,6 +24,7 @@
 ASM_SOURCES = 
 
 # Library/program dependencies
+LIBDRM_CFLAGS = `pkg-config --cflags libdrm`
 LIBDRM_LIB = `pkg-config --libs libdrm`
 DRI_LIB_DEPS = -L/usr/local/lib -lm -lpthread -lexpat $(LIBDRM_LIB)
 GL_LIB_DEPS = -L/usr/X11R6/lib -lX11 -lXext -lXxf86vm -lm -lpthread $(LIBDRM_LIB)