diff --git a/param.h b/param.h
index 8649e4486..e8fdfaeab 100644
--- a/param.h
+++ b/param.h
@@ -1803,7 +1803,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define SBGEMM_DEFAULT_UNROLL_M 32
 #define SBGEMM_DEFAULT_P 256
 #define SBGEMM_DEFAULT_Q 1024
+#ifndef DYNAMIC_ARCH
 #define SBGEMM_DEFAULT_R sbgemm_r
+#else
+#define SBGEMM_DEFAULT_R 43280
+#endif
 
 #ifdef ARCH_X86
 
@@ -1933,7 +1937,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define SBGEMM_DEFAULT_UNROLL_M 16
 #define SBGEMM_DEFAULT_P 384
 #define SBGEMM_DEFAULT_Q 768
+#ifndef DYNAMIC_ARCH
 #define SBGEMM_DEFAULT_R sbgemm_r
+#else
+#define SBGEMM_DEFAULT_R 43280
+#endif
 
 #ifdef ARCH_X86