diff --git a/src/common/numformatter.cpp b/src/common/numformatter.cpp
index 39f4f5743e..5422984ec3 100644
--- a/src/common/numformatter.cpp
+++ b/src/common/numformatter.cpp
@@ -172,7 +172,8 @@ void wxNumberFormatter::AddThousandsSeparators(wxString& s)
 void wxNumberFormatter::RemoveTrailingZeroes(wxString& s)
 {
     const size_t posDecSep = s.find(GetDecimalSeparator());
-    wxCHECK_RET( posDecSep != wxString::npos, "No decimal separator" );
+    wxCHECK_RET( posDecSep != wxString::npos,
+                 wxString::Format("No decimal separator in \"%s\"", s) );
     wxCHECK_RET( posDecSep, "Can't start with decimal separator" );
 
     // Find the last character to keep.