diff --git a/scripts/xtensa-build-all.sh b/scripts/xtensa-build-all.sh
index a4ae462cd929..62e2a64ef02b 100755
--- a/scripts/xtensa-build-all.sh
+++ b/scripts/xtensa-build-all.sh
@@ -118,7 +118,7 @@ then
 		echo "Error: No variable specified for RIMAGE_PRIVATE_KEY"
 		exit 1
 	fi
-	PRIVATE_KEY_OPTION="-DRIMAGE_PRIVATE_KEY=${RIMAGE_PRIVATE_KEY}"
+	PRIVATE_KEY_OPTION="-D${SIGNING_TOOL}_PRIVATE_KEY=${RIMAGE_PRIVATE_KEY}"
 fi
 
 OLDPATH=$PATH