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-rw-r--r--src/pssolve.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/pssolve.c b/src/pssolve.c
index 1f5bb44..569f0ff 100644
--- a/src/pssolve.c
+++ b/src/pssolve.c
@@ -20,6 +20,7 @@
#include <inttypes.h>
#include <limits.h>
#include <math.h>
+#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>