knownid.h lacks include guards

diff --git a/src/knownid.h b/src/knownid.h
index 568f301..8772ee0 100644 (file)
--- a/src/knownid.h
+++ b/src/knownid.h
@@ -15,6 +15,9 @@
  * the ABI!
  */
 
+#ifndef LIBSOLV_KNOWNID_H
+#define LIBSOLV_KNOWNID_H
+
 #undef KNOWNID
 #ifdef KNOWNID_INITIALIZE
 # define KNOWNID(a, b) b
@@ -252,3 +255,6 @@ KNOWNID(ID_NUM_INTERNAL,            0)
 
 #undef KNOWNID
 
+#endif
+
+