diff --git a/src/OpenFOAM/db/dictionary/dictionaryIO.C b/src/OpenFOAM/db/dictionary/dictionaryIO.C
index 7366959d39..e4b7e2d660 100644
--- a/src/OpenFOAM/db/dictionary/dictionaryIO.C
+++ b/src/OpenFOAM/db/dictionary/dictionaryIO.C
@@ -27,7 +27,6 @@ License
 
 #include "dictionary.H"
 #include "IFstream.H"
-#include "regExp.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //