diff --git a/buildjdk.sh b/buildjdk.sh
index 914b6d0..97e4197 100755
--- a/buildjdk.sh
+++ b/buildjdk.sh
@@ -4,7 +4,7 @@ set -e
 export FREETYPE_DIR=`pwd`/freetype-2.6.2/build_android-${TARGET_SHORT}
 export CUPS_DIR=`pwd`/cups-2.2.4
 
-export CPPFLAGS+=-I$FREETYPE_DIR -I$CUPS_DIR
+export CPPFLAGS+="-I$FREETYPE_DIR -I$CUPS_DIR"
 
 cp -R /usr/include/X11 $ANDROID_INCLUDE/
 # It isn't good, but need make it build anyways