diff --git a/plugins/DummySimPlugin.cc b/plugins/DummySimPlugin.cc
index 4b154e6e2d25cd9f98b9412c767da4d912f836d3..4008ff87397fa95114a5aab60fff295bc3f9c156 100644
--- a/plugins/DummySimPlugin.cc
+++ b/plugins/DummySimPlugin.cc
@@ -4,8 +4,8 @@
  * @author Jeremy McCormick, SLAC National Accelerator Laboratory
  */
 
-#ifndef SIMPLUGINS_DUMMYSIMPLUGIN_H_
-#define SIMPLUGINS_DUMMYSIMPLUGIN_H_
+#ifndef SLIC_DUMMYSIMPLUGIN_H_
+#define SLIC_DUMMYSIMPLUGIN_H_
 
 // LDMX
 #include "UserActionPlugin.hh"