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-rw-r--r--include/cdf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/cdf.h b/include/cdf.h
index 956e630..6c218cf 100644
--- a/include/cdf.h
+++ b/include/cdf.h
@@ -8,6 +8,7 @@
#include <unistd.h>
#include <stdio.h>
#include <getopt.h>
+#include <ctype.h>
#include <string.h>
#include <stdint.h>
#include <assert.h>