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-rw-r--r--include/cumsum.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/cumsum.h b/include/cumsum.h
index 9761a08..50ff0b1 100644
--- a/include/cumsum.h
+++ b/include/cumsum.h
@@ -5,6 +5,7 @@
#define H_CDF
#include <stdlib.h>
+#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>