diff --git a/camlibs/canon/library.h b/camlibs/canon/library.h
index 19f2c2ae0..1f77a4f8b 100644
--- a/camlibs/canon/library.h
+++ b/camlibs/canon/library.h
@@ -6,8 +6,8 @@
  *
  ****************************************************************************/
 
-#ifndef _CANON_H
-#define _CANON_H
+#ifndef _LIBRARY_H
+#define _LIBRARY_H
 
 /****************************************************************************
  *