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-rw-r--r--libhurd-btree/btree.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libhurd-btree/btree.c b/libhurd-btree/btree.c
index a2ec3bb..ab4152d 100644
--- a/libhurd-btree/btree.c
+++ b/libhurd-btree/btree.c
@@ -152,6 +152,7 @@ typedef BTREE_(node_t) *node;
/* Routines to check tree invariants. */
+#include <stdio.h>
#include <assert.h>
#define CHECK_TREE(a) check_tree(a)