diff --git a/build.sh b/build.sh
index 5d57fb8cb6e..011b731327e 100755
--- a/build.sh
+++ b/build.sh
@@ -186,7 +186,7 @@ function build_android() {
 
 	FA_RunCmd lunch ${PRODUCT}-${VARIANT}
 
-	clean_prop_target "$(cat ./out/soong/build_number.txt)"
+	clean_prop_target "$(cat ./out/soong/build_number.txt 2>/dev/null)"
 	FA_RunCmd ${MAKE} $*
 }