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-rw-r--r--sub/dec_sub.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sub/dec_sub.c b/sub/dec_sub.c
index 5fb8722296..fb7e5e4a2a 100644
--- a/sub/dec_sub.c
+++ b/sub/dec_sub.c
@@ -19,6 +19,7 @@
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
+#include <math.h>
#include <assert.h>
#include "config.h"