diff --git a/Source/kwsys/kwsys_ios_iosfwd.h.in b/Source/kwsys/kwsys_ios_iosfwd.h.in
index 1df5c7276..9882485e8 100644
--- a/Source/kwsys/kwsys_ios_iosfwd.h.in
+++ b/Source/kwsys/kwsys_ios_iosfwd.h.in
@@ -23,7 +23,6 @@
 
 #if @KWSYS_NAMESPACE@_IOS_USE_ANSI
 # include <iosfwd>
-# include <fstream>
 #else
 class fstream;
 class ifstream;