diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index cd35e7cbe76f75..a80a55e054a3b7 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -17190,7 +17190,7 @@ static NVPTXMmaLdstInfo getNVPTXMmaLdstInfo(unsigned BuiltinID) {
   case NVPTX::BI__mma_tf32_m16n16k8_ld_a:
     return MMA_LDST(4, m16n16k8_load_a_tf32);
   case NVPTX::BI__mma_tf32_m16n16k8_ld_b:
-    return MMA_LDST(2, m16n16k8_load_b_tf32);
+    return MMA_LDST(4, m16n16k8_load_b_tf32);
   case NVPTX::BI__mma_tf32_m16n16k8_ld_c:
     return MMA_LDST(8, m16n16k8_load_c_f32);