diff --git a/src/tools/types/cpp.jam b/src/tools/types/cpp.jam
index 29d8faaa8..846ba5356 100644
--- a/src/tools/types/cpp.jam
+++ b/src/tools/types/cpp.jam
@@ -30,7 +30,7 @@ class c-scanner : scanner
 
     rule pattern ( )
     {
-        return "#[ \t]*include[ ]*(<(.*)>|\"(.*)\")" ;
+        return "#[ \t]*include[ \t]*(<(.*)>|\"(.*)\")" ;
     }
 
     rule process ( target : matches * : binding )