diff --git a/Source/kwsys/SystemInformation.cxx b/Source/kwsys/SystemInformation.cxx
index d727b3265..f871075c0 100644
--- a/Source/kwsys/SystemInformation.cxx
+++ b/Source/kwsys/SystemInformation.cxx
@@ -66,7 +66,6 @@
 #endif
 
 #ifdef __linux
-# include <sys/procfs.h>
 # include <sys/types.h>
 # include <unistd.h>
 # include <fcntl.h>