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-rw-r--r--libguile/guardians.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/guardians.c b/libguile/guardians.c
index b3f8fe660..cb12663a2 100644
--- a/libguile/guardians.c
+++ b/libguile/guardians.c
@@ -50,6 +50,7 @@
#endif
#include "libguile/_scm.h"
+#include "libguile/boolean.h"
#include "libguile/bdw-gc.h"
#include "libguile/deprecation.h"