diff --git a/env/mmc.c b/env/mmc.c
index 3343f9e..ed7bcf1 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -73,7 +73,7 @@
 		.partition = "u-boot,mmc-env-partition",
 		.offset = "u-boot,mmc-env-offset",
 	};
-	s64 val, defvalue;
+	s64 val = 0, defvalue;
 	const char *propname;
 	const char *str;
 	int err;