--- a/splash/SplashBitmap.cc
+++ b/splash/SplashBitmap.cc
@@ -62,7 +62,7 @@ SplashBitmap::SplashBitmap(int widthA, int heightA, int rowPad,
   }
   rowSize += rowPad - 1;
   rowSize -= rowSize % rowPad;
-  data = (SplashColorPtr)gmalloc(rowSize * height);
+  data = (SplashColorPtr)gmallocn(rowSize, height);
   if (!topDown) {
     data += (height - 1) * rowSize;
     rowSize = -rowSize;