diff --git a/RtAudio.cpp b/RtAudio.cpp
index af7d205..9e1f1ba 100644
--- a/RtAudio.cpp
+++ b/RtAudio.cpp
@@ -3630,12 +3630,12 @@ public:
       outIndex_( 0 ) {}
 
   ~WasapiBuffer() {
-    delete buffer_;
+    free( buffer_ );
   }
 
   // sets the length of the internal ring buffer
   void setBufferSize( unsigned int bufferSize, unsigned int formatBytes ) {
-    delete buffer_;
+    free( buffer_ );
 
     buffer_ = ( char* ) calloc( bufferSize, formatBytes );