diff --git a/src/generic/splitter.cpp b/src/generic/splitter.cpp
index 7f631aa457..bc24c4bae5 100644
--- a/src/generic/splitter.cpp
+++ b/src/generic/splitter.cpp
@@ -676,12 +676,12 @@ bool wxSplitterWindow::OnSashPositionChange(int newSashPosition)
 
   if ( m_splitMode == wxSPLIT_VERTICAL )
   {
-    if ( h - newSashPosition < m_minimumPaneSize )
+    if ( w - newSashPosition < m_minimumPaneSize )
       return FALSE;
   }
   else // m_splitMode = wxSPLIT_HORIZONTAL
   {
-    if ( w - newSashPosition < m_minimumPaneSize )
+    if ( h - newSashPosition < m_minimumPaneSize )
       return FALSE;
   }