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-rw-r--r--malloc/malloc.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/malloc/malloc.h b/malloc/malloc.h
index eeb33a2949..c453d728e6 100644
--- a/malloc/malloc.h
+++ b/malloc/malloc.h
@@ -20,6 +20,8 @@
 #ifndef _MALLOC_H
 #define _MALLOC_H 1
 
+#include <features.h>
+
 /*
   `ptmalloc', a malloc implementation for multiple threads without
   lock contention, by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>.