diff --git a/pathexec_env.c b/pathexec_env.c
index 157e71b..931f6a4 100644
--- a/pathexec_env.c
+++ b/pathexec_env.c
@@ -64,5 +64,5 @@
   e[elen] = 0;
 
   pathexec_run(*argv,argv,e);
-  alloc_free(e);
+  alloc_free((char*)e);
 }