diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 58e4ffaa2ed..b5bb399eef1 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -1771,6 +1771,25 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
 				   writeonly_memory);
 }
 
+void
+ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
+			    LLVMValueRef rsrc,
+			    LLVMValueRef vdata,
+			    LLVMValueRef voffset,
+			    LLVMValueRef soffset,
+			    bool glc,
+			    bool writeonly_memory)
+{
+	unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_8;
+	unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT;
+
+	vdata = LLVMBuildBitCast(ctx->builder, vdata, ctx->i8, "");
+	vdata = LLVMBuildZExt(ctx->builder, vdata, ctx->i32, "");
+
+	ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset,
+				   ctx->i32_0, 1, dfmt, nfmt, glc, false,
+				   writeonly_memory);
+}
 /**
  * Set range metadata on an instruction.  This can only be used on load and
  * call instructions.  If you know an instruction can only produce the values
diff --git a/src/amd/common/ac_llvm_build.h b/src/amd/common/ac_llvm_build.h
index 0162986e454..aa6e913c6c6 100644
--- a/src/amd/common/ac_llvm_build.h
+++ b/src/amd/common/ac_llvm_build.h
@@ -362,6 +362,15 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
 			     bool glc,
 			     bool writeonly_memory);
 
+void
+ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
+			    LLVMValueRef rsrc,
+			    LLVMValueRef vdata,
+			    LLVMValueRef voffset,
+			    LLVMValueRef soffset,
+			    bool glc,
+			    bool writeonly_memory);
+
 void
 ac_build_struct_tbuffer_store(struct ac_llvm_context *ctx,
 			      LLVMValueRef rsrc,