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-rw-r--r--libguile/weak-set.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/weak-set.c b/libguile/weak-set.c
index 30830895d..7a4d8dab1 100644
--- a/libguile/weak-set.c
+++ b/libguile/weak-set.c
@@ -25,6 +25,7 @@
#include <assert.h>
#include "libguile/_scm.h"
+#include "libguile/pairs.h"
#include "libguile/finalizers.h"
#include "libguile/hash.h"
#include "libguile/eval.h"