diff --git a/ChangeLog b/ChangeLog
index 39a9b05..9a32702 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 NVIDIA Texture Tools version 2.0.3
  * More accurate DXT3 compressor. Fixes issue 38.
+ * Fix error in fast downsample filter, reported by Noel Llopis.
 
 NVIDIA Texture Tools version 2.0.2
  * Fix copy ctor error reported by Richard Sim.
diff --git a/src/nvimage/FloatImage.cpp b/src/nvimage/FloatImage.cpp
index 75d02a1..baa99dd 100644
--- a/src/nvimage/FloatImage.cpp
+++ b/src/nvimage/FloatImage.cpp
@@ -376,7 +376,7 @@ FloatImage * FloatImage::fastDownSample() const
 	{
 		const uint n = w * h;
 		
-		if (n & 1)
+		if ((m_width * m_height) & 1)
 		{
 			const float scale = 1.0f / (2 * n + 1);