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-rw-r--r--limbo/limbo.y1
1 files changed, 1 insertions, 0 deletions
diff --git a/limbo/limbo.y b/limbo/limbo.y
index 36851fde..cc680b65 100644
--- a/limbo/limbo.y
+++ b/limbo/limbo.y
@@ -1,5 +1,6 @@
%{
#include "limbo.h"
+#include <ctype.h>
%}
%union