diff --git a/scripts/rsatoc.c b/scripts/rsatoc.c
index 6473802..8f2eb8f 100644
--- a/scripts/rsatoc.c
+++ b/scripts/rsatoc.c
@@ -471,10 +471,12 @@
 		path++;
 
 		if (!strncmp(path, "__ENV__", 7)) {
-			path = getenv(path + 7);
+			const char *orig_path = path;
+
+			path = getenv(orig_path + 7);
 			if (!path) {
 				fprintf(stderr, "%s doesn't contain a path\n",
-					path + 7);
+					orig_path + 7);
 				exit(1);
 			}
 		}