diff --git a/sw/blas/gemm/verify.py b/sw/blas/gemm/verify.py
index 02f9249ef7..a2ef572efe 100755
--- a/sw/blas/gemm/verify.py
+++ b/sw/blas/gemm/verify.py
@@ -59,8 +59,8 @@ def main():
     c_golden = golden_model(1, a, b, beta, c).flatten()
 
     absolute_err = np.absolute(c_golden - c_actual)
-    fail = np.any(absolute_err > ERR_THRESHOLD)
-    if (fail):
+    fail = np.any(absolute_err > ERR_THRESHOLD[prec]) or np.isnan(c_actual).any()
+    if fail:
         print('Simulation results are incorrect.')
         verification.dump_results_to_csv([c_golden, c_actual, absolute_err],
                                          Path.cwd() / 'results.csv')