diff --git a/src/os2/control.cpp b/src/os2/control.cpp
index f390b9c38b..c9354af222 100644
--- a/src/os2/control.cpp
+++ b/src/os2/control.cpp
@@ -284,10 +284,10 @@ void wxFindMaxSize(
     if (nRight > pRect->xRight)
         pRect->xRight = nRight;
 
-    if (nTop < pRect->yTop)
+    if (nTop > pRect->yTop)
         pRect->yTop = nTop;
 
-    if (nBottom > pRect->yBottom)
+    if (nBottom < pRect->yBottom)
         pRect->yBottom = nBottom;
 } // end of wxFindMaxSize