diff --git a/driver/level2/gbmv_thread.c b/driver/level2/gbmv_thread.c
index 6073a4856..9d374676e 100644
--- a/driver/level2/gbmv_thread.c
+++ b/driver/level2/gbmv_thread.c
@@ -230,10 +230,11 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG ku, BLASLONG kl, FLOAT *alpha, FLOAT
 
 #ifndef TRANSA
     range_m[num_cpu] = num_cpu * ((m + 15) & ~15);
+    if (range_m[num_cpu] > m) range_m[num_cpu] = m;
 #else
     range_m[num_cpu] = num_cpu * ((n + 15) & ~15);
-#endif
     if (range_m[num_cpu] > n) range_m[num_cpu] = n;
+#endif
 
     queue[num_cpu].mode    = mode;
     queue[num_cpu].routine = gbmv_kernel;