diff --git a/kernel/arm64/sgemm_kernel_sve_v2x8.S b/kernel/arm64/sgemm_kernel_sve_v2x8.S
index c969ed4db..60e1f347b 100644
--- a/kernel/arm64/sgemm_kernel_sve_v2x8.S
+++ b/kernel/arm64/sgemm_kernel_sve_v2x8.S
@@ -55,8 +55,8 @@ With this approach, we can reuse sgemm_n|tcopy_sve_v1.c packing functions. */
 #define lanes		x15
 #define pA1	    	x16
 #define pA2	    	x17
-#define alpha		w18
-#define vec_len		x19
+#define alpha		w19
+#define vec_len		x20
 #define vec_lenx2   x20
 
 #define alpha0		s10