diff --git a/src/generic/bmpcboxg.cpp b/src/generic/bmpcboxg.cpp
index e74fabd3c1..3432680bd6 100644
--- a/src/generic/bmpcboxg.cpp
+++ b/src/generic/bmpcboxg.cpp
@@ -319,7 +319,7 @@ void wxBitmapComboBox::DetermineIndent()
 
     if ( m_usedImgSize.x > 0 )
     {
-        indent = m_usedImgSize.y + IMAGE_SPACING_LEFT + IMAGE_SPACING_RIGHT;
+        indent = m_usedImgSize.x + IMAGE_SPACING_LEFT + IMAGE_SPACING_RIGHT;
         m_imgAreaWidth = indent;
 
         indent -= 3;