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-rw-r--r--lib/math.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/math.c b/lib/math.c
index 5a68f5e8b2..a4731edb9a 100644
--- a/lib/math.c
+++ b/lib/math.c
@@ -118,6 +118,7 @@
#include <linux/ctype.h>
#include <linux/string.h>
#include <libbb.h>
+#include <errno.h>
#include <math.h>
#define lookupvar (math_state->lookupvar)