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-rw-r--r--include/klee/Internal/ADT/DiscretePDF.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/klee/Internal/ADT/DiscretePDF.h b/include/klee/Internal/ADT/DiscretePDF.h
index bda851fa..74a1ce9e 100644
--- a/include/klee/Internal/ADT/DiscretePDF.h
+++ b/include/klee/Internal/ADT/DiscretePDF.h
@@ -7,6 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef KLEE_DISCRETEPDF_H
+#define KLEE_DISCRETEPDF_H
+
 namespace klee {
   template <class T>
   class DiscretePDF {
@@ -45,3 +48,5 @@ namespace klee {
 }
 
 #include "DiscretePDF.inc"
+
+#endif /* KLEE_DISCRETEPDF_H */