diff --git a/param.h b/param.h
index 7a18d82d7..fa6730208 100644
--- a/param.h
+++ b/param.h
@@ -1508,6 +1508,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define SYMV_P  8
 
 #define SWITCH_RATIO	32
+#define GEMM_PREFERED_SIZE	16
 
 #ifdef ARCH_X86