diff --git a/param.h b/param.h
index 03d6fa11d4..f3731c491e 100644
--- a/param.h
+++ b/param.h
@@ -2894,8 +2894,8 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CGEMM_DEFAULT_UNROLL_M  2
 #define CGEMM_DEFAULT_UNROLL_N  2
 
-#define ZGEMM_DEFAULT_UNROLL_M  2
-#define ZGEMM_DEFAULT_UNROLL_N  2
+#define ZGEMM_DEFAULT_UNROLL_M  1
+#define ZGEMM_DEFAULT_UNROLL_N  4
 
 #define SGEMM_DEFAULT_P	128
 #define DGEMM_DEFAULT_P	128