diff --git a/timing/time_zgeqrf_tile.c b/timing/time_zgeqrf_tile.c
index b3fdf09aa258b713add489b34c37b25154eaee4f..fe5b5c79d7d4fa0d8ac96475ac379273134674a9 100644
--- a/timing/time_zgeqrf_tile.c
+++ b/timing/time_zgeqrf_tile.c
@@ -45,6 +45,7 @@ RunTest(int *iparam, double *dparam, morse_time_t *t_)
 
     /* Allocate Workspace */
     MORSE_Alloc_Workspace_zgels_Tile(M, N, &descT);
+    memset(descT->mat, 0, (descT->llm*descT->lln)*sizeof(MorseComplexDouble));
 
     /* Do the computations */
     START_TIMING();