diff --git a/extras/the jucer/src/utility/jucer_UtilityFunctions.cpp b/extras/the jucer/src/utility/jucer_UtilityFunctions.cpp
index c14f28883c..28ef0ca788 100644
--- a/extras/the jucer/src/utility/jucer_UtilityFunctions.cpp	
+++ b/extras/the jucer/src/utility/jucer_UtilityFunctions.cpp	
@@ -223,6 +223,9 @@ const String makeValidCppIdentifier (String s,
             n << words[i];
     }
 
+    if (CharacterFunctions::isDigit (n[0]))
+        n = T("_") + n;
+
     // make sure it's not a reserved c++ keyword..
     static const tchar* const reservedWords[] =
     {