diff --git a/src/propgrid/property.cpp b/src/propgrid/property.cpp
index c5d4b0ec92..799227b28f 100644
--- a/src/propgrid/property.cpp
+++ b/src/propgrid/property.cpp
@@ -2462,7 +2462,7 @@ wxPGProperty* wxPGProperty::GetItemAtY( unsigned int y,
                                         unsigned int lh,
                                         unsigned int* nextItemY ) const
 {
-    wxASSERT( nextItemY );
+    wxCHECK( nextItemY, nullptr );
 
     // Linear search at the moment
     //