diff --git a/include/Stk.h b/include/Stk.h
index 5c9c37b..d5bf1b2 100644
--- a/include/Stk.h
+++ b/include/Stk.h
@@ -376,7 +376,7 @@ public:
   unsigned int channels( void ) const { return nChannels_; };
 
   //! Return the number of sample frames represented by the data.
-  unsigned int frames( void ) const { return nFrames_; };
+  unsigned int frames( void ) const { return (unsigned int)nFrames_; };
 
   //! Set the sample rate associated with the StkFrames data.
   /*!