diff --git a/src/Common/Dlgcode.c b/src/Common/Dlgcode.c
index 04fec471..cc368df5 100644
--- a/src/Common/Dlgcode.c
+++ b/src/Common/Dlgcode.c
@@ -5134,7 +5134,7 @@ static BOOL PerformBenchmark(HWND hBenchDlg, HWND hwndDlg)
 	startDataUnitNo.Value = 0;
 
 	/* set priority to critical only when there are 2 or more CPUs on the system */
-	if (sysInfo.dwNumberOfProcessors > 1)
+	if (sysInfo.dwNumberOfProcessors > 1 && (benchmarkType != BENCHMARK_TYPE_ENCRYPTION))
 		SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
 
 	ci = crypto_open ();