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-rw-r--r--progs/demos/ray.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/progs/demos/ray.c b/progs/demos/ray.c
index 2173b54fd4d..fbee960053c 100644
--- a/progs/demos/ray.c
+++ b/progs/demos/ray.c
@@ -8,6 +8,7 @@
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <math.h>
#ifdef WIN32