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-rw-r--r--libguile/backtrace.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/backtrace.c b/libguile/backtrace.c
index 76ac12861..17d8f8154 100644
--- a/libguile/backtrace.c
+++ b/libguile/backtrace.c
@@ -26,6 +26,7 @@
#include <ctype.h>
#include "libguile/_scm.h"
+#include "libguile/boolean.h"
#include <unistd.h>
#ifdef HAVE_IO_H