diff --git a/common/libeval/numeric_evaluator.cpp b/common/libeval/numeric_evaluator.cpp
index bb2ac5dec6..c6e98cccfd 100644
--- a/common/libeval/numeric_evaluator.cpp
+++ b/common/libeval/numeric_evaluator.cpp
@@ -214,7 +214,7 @@ bool NUMERIC_EVALUATOR::IsOldSchoolDecimalSeparator( wxUniChar ch, double* siSca
 
 
 // Limited version of above for 8-bit chars
-bool NUMERIC_EVALUATOR::isOldSchoolDecimalSeparator( char ch, double* siScaler )
+bool NUMERIC_EVALUATOR::IsOldSchoolDecimalSeparator( char ch, double* siScaler )
 {
     switch( ch )
     {
@@ -242,7 +242,7 @@ bool NUMERIC_EVALUATOR::IsDecimalSeparator( char ch, char localeSeparator, bool
     if( ch == localeSeparator || ch == '.' || ch == ',' )
         return true;
 
-    if( allowInfixNotation && isOldSchoolDecimalSeparator( ch, &dummy ) )
+    if( allowInfixNotation && IsOldSchoolDecimalSeparator( ch, &dummy ) )
         return true;
 
     return false;
@@ -294,7 +294,7 @@ NUMERIC_EVALUATOR::Token NUMERIC_EVALUATOR::getToken()
                         else
                             haveSeparator = true;
 
-                        if( isOldSchoolDecimalSeparator( ch, &siScaler ) )
+                        if( IsOldSchoolDecimalSeparator( ch, &siScaler ) )
                             *aScaler = siScaler;
 
                         m_token.token[ idx++ ] = m_localeDecimalSeparator;
@@ -410,7 +410,7 @@ NUMERIC_EVALUATOR::Token NUMERIC_EVALUATOR::getToken()
                     return Unit::Mil;
                 }
 
-                if( allowInfix && sizeLeft >= 1 && isOldSchoolDecimalSeparator( ch, siScaler ) )
+                if( allowInfix && sizeLeft >= 1 && IsOldSchoolDecimalSeparator( ch, siScaler ) )
                 {
                     m_token.pos++;
                     return Unit::SI;
diff --git a/include/libeval/numeric_evaluator.h b/include/libeval/numeric_evaluator.h
index e4596cd02b..c61947506b 100644
--- a/include/libeval/numeric_evaluator.h
+++ b/include/libeval/numeric_evaluator.h
@@ -157,7 +157,7 @@ public:
     void ClearVar() { m_varMap.clear(); }
 
     static bool IsOldSchoolDecimalSeparator( wxUniChar ch, double* siScaler );
-    static bool isOldSchoolDecimalSeparator( char ch, double* siScaler );
+    static bool IsOldSchoolDecimalSeparator( char ch, double* siScaler );
     static bool IsDecimalSeparator( char ch, char localeSeparator, bool allowInfixNotation );
     static bool IsDigit( char ch );