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-rw-r--r--TOOLS/gltest.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/TOOLS/gltest.c b/TOOLS/gltest.c
index e8c6d33146..1bfdce5e67 100644
--- a/TOOLS/gltest.c
+++ b/TOOLS/gltest.c
@@ -5,6 +5,7 @@
#include <stdlib.h>
#include <math.h>
#include <inttypes.h>
+#include <string.h>
// pixel size: 3 or 4
#define BYTES_PP 3