diff --git a/param.h b/param.h
index c1dff1367..e5e736622 100644
--- a/param.h
+++ b/param.h
@@ -1669,14 +1669,22 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #else
 
 #define SGEMM_DEFAULT_UNROLL_M 16
+#ifndef DYNAMIC_ARCH
 #define DGEMM_DEFAULT_UNROLL_M 16
+#else
+#define DGEMM_DEFAULT_UNROLL_M 4
+#endif
 #define QGEMM_DEFAULT_UNROLL_M 2
 #define CGEMM_DEFAULT_UNROLL_M 8
 #define ZGEMM_DEFAULT_UNROLL_M 4
 #define XGEMM_DEFAULT_UNROLL_M 1
 
 #define SGEMM_DEFAULT_UNROLL_N 4
+#ifndef DYNAMIC_ARCH
 #define DGEMM_DEFAULT_UNROLL_N 2
+#else
+#define DGEMM_DEFAULT_UNROLL_N 8
+#endif
 #define QGEMM_DEFAULT_UNROLL_N 2
 #define CGEMM_DEFAULT_UNROLL_N 2
 #define ZGEMM_DEFAULT_UNROLL_N 2