diff --git a/uisimulator/common/io.c b/uisimulator/common/io.c
index f44a69bc69..6e21116add 100644
--- a/uisimulator/common/io.c
+++ b/uisimulator/common/io.c
@@ -192,7 +192,7 @@ int sim_mkdir(const char *name, mode_t mode)
     /* since we build with -DNOCYGWIN we have the plain win32 version */
     return mkdir(buffer);
 #else
-    return mkdir(buffer, 0666);
+    return mkdir(buffer, 0777);
 #endif
 }