diff --git a/src/kernel/libroot/posix/stdlib/env.c b/src/kernel/libroot/posix/stdlib/env.c
index 8fd6501496..997e250ef0 100644
--- a/src/kernel/libroot/posix/stdlib/env.c
+++ b/src/kernel/libroot/posix/stdlib/env.c
@@ -57,8 +57,8 @@ putenv(const char *string)
 		errno = EINVAL;
 		return -1;
 	}
-	
-	strlcpy(name, string, value - string);
+
+	strlcpy(name, string, value + 1 - string);
 	value++;
 
 	return setenv(name, value, true);