diff --git a/opencl/tests/ocltst/module/perf/OCLPerfMemLatency.cpp b/opencl/tests/ocltst/module/perf/OCLPerfMemLatency.cpp
index 558ccf1244..9670aed398 100644
--- a/opencl/tests/ocltst/module/perf/OCLPerfMemLatency.cpp
+++ b/opencl/tests/ocltst/module/perf/OCLPerfMemLatency.cpp
@@ -369,9 +369,9 @@ void OCLPerfMemLatency::run(void) {
   char buf[256];
   char buf2[32];
   if (makeRW)
-    SNPRINTF(buf2, sizeof(buf), "volatileRW");
+    SNPRINTF(buf2, sizeof(buf2), "volatileRW");
   else if (makeVolatile)
-    SNPRINTF(buf2, sizeof(buf), "volatile");
+    SNPRINTF(buf2, sizeof(buf2), "volatile");
   else
     buf2[0] = '\0';
   SNPRINTF(buf, sizeof(buf), "%10s %2d threads, %8d reads, %5d repeats (ns)",