diff --git a/src/os2/utils.cpp b/src/os2/utils.cpp
index 59b47374bb..1611b06941 100644
--- a/src/os2/utils.cpp
+++ b/src/os2/utils.cpp
@@ -283,7 +283,7 @@ void wxUsleep(
   unsigned long                     ulMilliseconds
 )
 {
-    ::DosSleep(ulMilliseconds/1000l);
+    ::DosSleep(ulMilliseconds);
 }
 
 void wxSleep(