1 files changed, 1 insertions, 1 deletions
diff --git a/common/compat.h b/common/compat.h
index 68786a7..7f848d2 100644
--- a/common/compat.h
+++ b/common/compat.h
@@ -183,7 +183,7 @@ char *     strnstr          (const char *s,
 
 #ifndef HAVE_MEMDUP
 
-void *     memdup           (void *data,
+void *     memdup           (const void *data,
                              size_t length);
 
 #endif /* HAVE_MEMDUP */