diff --git a/sp_PerfCheck/sp_PerfCheck.sql b/sp_PerfCheck/sp_PerfCheck.sql
index 28b09416..1bfca49f 100644
--- a/sp_PerfCheck/sp_PerfCheck.sql
+++ b/sp_PerfCheck/sp_PerfCheck.sql
@@ -2004,7 +2004,9 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
             @server_uptime_hours = 
                 DATEDIFF(SECOND, osi.sqlserver_start_time, GETDATE()) / 3600.0
         FROM sys.dm_os_wait_stats AS osw
-        CROSS JOIN sys.dm_os_sys_info AS osi;
+        CROSS JOIN sys.dm_os_sys_info AS osi
+        GROUP BY 
+            DATEDIFF(SECOND, osi.sqlserver_start_time, GETDATE()) / 3600.0;
 
         SET @pagelatch_ratio_to_uptime = 
             @pagelatch_wait_hours / NULLIF(@server_uptime_hours, 0) * 100;