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-rw-r--r--include/internal/constant_time.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/internal/constant_time.h b/include/internal/constant_time.h
index dc75e31df1..b50b10ba80 100644
--- a/include/internal/constant_time.h
+++ b/include/internal/constant_time.h
@@ -9,6 +9,7 @@
#ifndef OSSL_INTERNAL_CONSTANT_TIME_H
# define OSSL_INTERNAL_CONSTANT_TIME_H
+# pragma once
# include <stdlib.h>
# include <string.h>