diff --git a/src/mred/wxs/wxs_dc.cxx b/src/mred/wxs/wxs_dc.cxx
index 6841af456c..bd5b577319 100644
--- a/src/mred/wxs/wxs_dc.cxx
+++ b/src/mred/wxs/wxs_dc.cxx
@@ -698,9 +698,9 @@ static void ScaleSection(wxMemoryDC *dest, wxBitmap *src,
 	b = (b * (1 - a)) + ((double)s2[p+3] * a);
       }
 
-      s2[p+1] = (int)r;
-      s2[p+2] = (int)g;
-      s2[p+3] = (int)b;
+      s2[p+1] = (int)round(r);
+      s2[p+2] = (int)round(g);
+      s2[p+3] = (int)round(b);
     }
   }
 
diff --git a/src/mred/wxs/wxs_dc.xc b/src/mred/wxs/wxs_dc.xc
index 633481f4dc..4c4db3df24 100644
--- a/src/mred/wxs/wxs_dc.xc
+++ b/src/mred/wxs/wxs_dc.xc
@@ -564,9 +564,9 @@ static void ScaleSection(wxMemoryDC *dest, wxBitmap *src,
 	b = (b * (1 - a)) + ((double)s2[p+3] * a);
       }
 
-      s2[p+1] = (int)r;
-      s2[p+2] = (int)g;
-      s2[p+3] = (int)b;
+      s2[p+1] = (int)round(r);
+      s2[p+2] = (int)round(g);
+      s2[p+3] = (int)round(b);
     }
   }