diff --git a/hw/xfree86/common/xf86AutoConfig.c b/hw/xfree86/common/xf86AutoConfig.c
index eb61f879a..5c6e7210c 100644
--- a/hw/xfree86/common/xf86AutoConfig.c
+++ b/hw/xfree86/common/xf86AutoConfig.c
@@ -120,7 +120,7 @@ FreeList(const char ***list, int *lines)
     int i;
 
     for (i = 0; i < *lines; i++) {
-	free((*list)[i]);
+	free((char *)((*list)[i]));
     }
     free(*list);
     *list = NULL;