diff --git a/Makefile b/Makefile
index 583b196..3bab0a8 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,16 @@ PC_LIBS := $(shell $(PKG_CONFIG) --libs $(PC_DEPS))
 CPPFLAGS += -std=c99 -D_GNU_SOURCE=1
 CFLAGS += -Wall -Wsign-compare -Wpointer-arith -Wcast-qual -Wcast-align
 
+ifdef $(GBM_EXYNOS)
+	CFLAGS += $(shell $(PKG_CONFIG) --cflags libdrm_exynos)
+endif
+ifdef $(GBM_I915)
+	CFLAGS += $(shell $(PKG_CONFIG) --cflags libdrm_intel)
+endif
+ifdef $(GBM_ROCKCHIP)
+	CFLAGS += $(shell $(PKG_CONFIG) --cflags libdrm_rockchip)
+endif
+
 CPPFLAGS += $(PC_CFLAGS)
 LDLIBS += $(PC_LIBS)