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-rw-r--r--libguile/symbols.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/symbols.c b/libguile/symbols.c
index 3746cf6eb..b9d575778 100644
--- a/libguile/symbols.c
+++ b/libguile/symbols.c
@@ -43,6 +43,7 @@
#include "srfi-13.h"
#include "strings.h"
#include "strorder.h"
+#include "threads.h"
#include "variable.h"
#include "vectors.h"
#include "weak-set.h"