diff --git a/src/if_ole.cpp b/src/if_ole.cpp
index e52f5ec..cb643e5 100644
--- a/src/if_ole.cpp
+++ b/src/if_ole.cpp
@@ -376,7 +376,7 @@
     if (len == 0)
 	return E_INVALIDARG;
 
-    buffer = (char *)alloc((unsigned)len);
+    buffer = (char *)alloc(len);
 
     if (buffer == NULL)
 	return E_OUTOFMEMORY;