diff --git a/include/wx/hashmap.h b/include/wx/hashmap.h
index a2cc550e0f..9a25f8e183 100644
--- a/include/wx/hashmap.h
+++ b/include/wx/hashmap.h
@@ -467,7 +467,7 @@ inline bool never_grow( size_t, size_t ) { return false; }
 inline bool never_shrink( size_t, size_t ) { return false; }
 inline bool grow_lf70( size_t buckets, size_t items )
 {
-    return float(items)/float(buckets) >= 0.85;
+    return float(items)/float(buckets) >= 0.85f;
 }
 
 #endif // various hash map implementations