diff --git a/core/fxge/dib/cfx_scanlinecompositor.cpp b/core/fxge/dib/cfx_scanlinecompositor.cpp
index 5e25641..ab62044 100644
--- a/core/fxge/dib/cfx_scanlinecompositor.cpp
+++ b/core/fxge/dib/cfx_scanlinecompositor.cpp
@@ -2753,7 +2753,7 @@
   if (GetBppFromFormat(dest_format) == 1)
     return false;
 
-  if (m_bRgbByteOrder && m_DestFormat == FXDIB_Format::k8bppMask)
+  if (m_bRgbByteOrder && GetBppFromFormat(m_DestFormat) == 8)
     return false;
 
   if (m_SrcFormat == FXDIB_Format::k1bppMask ||