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-rw-r--r--lib/fstream/internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/fstream/internal.h b/lib/fstream/internal.h
index 2dc81e4..4f02f8c 100644
--- a/lib/fstream/internal.h
+++ b/lib/fstream/internal.h
@@ -16,6 +16,7 @@
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
+#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>