diff --git a/src/runtime/heuristics/matmul_native/ClMatMulNativeDefaultConfigValhall.cpp b/src/runtime/heuristics/matmul_native/ClMatMulNativeDefaultConfigValhall.cpp
index 6b64141..4b92354 100644
--- a/src/runtime/heuristics/matmul_native/ClMatMulNativeDefaultConfigValhall.cpp
+++ b/src/runtime/heuristics/matmul_native/ClMatMulNativeDefaultConfigValhall.cpp
@@ -109,7 +109,7 @@
     unsigned int m, unsigned int n, unsigned int k, unsigned int b, bool rhs_lock_padding, const MatMulInfo &info)
 {
     ARM_COMPUTE_UNUSED(m, n, k, b, rhs_lock_padding);
-    return {info.adj_lhs(), info.adj_rhs(), /* m0 */ 1, /* n0 */ 16, /* k0 */ 4, /* export_to_cl_image */ false};
+    return {info.adj_lhs(), info.adj_rhs(), /* m0 */ 4, /* n0 */ 16, /* k0 */ 4, /* export_to_cl_image */ false};
 }
 
 MatMulKernelInfo ClMatMulNativeDefaultConfigValhall::configure_G710_f32(