diff --git a/src/common/image.cpp b/src/common/image.cpp
index dbcff9c883..6f6bba4117 100644
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -817,7 +817,7 @@ void wxImage::SetAlpha( unsigned char *alpha )
         alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
     }
 
-    delete [] M_IMGDATA->m_alpha;
+    free(M_IMGDATA->m_alpha);
     M_IMGDATA->m_alpha = alpha;
 }