diff --git a/conf/Makefile.omap b/conf/Makefile.omap
index da99052ec3..f7339de37a 100644
--- a/conf/Makefile.omap
+++ b/conf/Makefile.omap
@@ -37,7 +37,7 @@ Q=@
 
 OPT=3
 CSTANDARD = -std=gnu99
-CINCS = -I$(PAPARAZZI_SRC)/sw/include
+CINCS = $(INCLUDES) -I$(PAPARAZZI_SRC)/sw/include
 
 # Compiler flags.
 CFLAGS += $(CINCS)