diff --git a/lapack-netlib/SRC/zunhr_col.f b/lapack-netlib/SRC/zunhr_col.f
index 3c7b2deb18..ce5c09e068 100644
--- a/lapack-netlib/SRC/zunhr_col.f
+++ b/lapack-netlib/SRC/zunhr_col.f
@@ -420,7 +420,7 @@ SUBROUTINE ZUNHR_COL( M, N, NB, A, LDA, T, LDT, D, INFO )
 *
          JBTEMP2 = JB - 2
          DO J = JB, JB+JNB-2
-            DO I = J-JBTEMP2, NB
+            DO I = J-JBTEMP2, MIN( NB, N )
                T( I, J ) = CZERO
             END DO
          END DO
@@ -436,4 +436,4 @@ SUBROUTINE ZUNHR_COL( M, N, NB, A, LDA, T, LDT, D, INFO )
 *
 *     End of ZUNHR_COL
 *
-      END
\ No newline at end of file
+      END