diff --git a/src/gallium/frontends/clover/llvm/codegen/common.cpp b/src/gallium/frontends/clover/llvm/codegen/common.cpp
index 2ed46794def..13cb91547ac 100644
--- a/src/gallium/frontends/clover/llvm/codegen/common.cpp
+++ b/src/gallium/frontends/clover/llvm/codegen/common.cpp
@@ -233,8 +233,8 @@ namespace {
                }
 
             } else {
-               const bool needs_sign_ext = f.getAttributes().hasAttribute(
-                  arg.getArgNo() + 1, ::llvm::Attribute::SExt);
+               const bool needs_sign_ext = f.getAttributes().hasParamAttr(
+                  arg.getArgNo(), ::llvm::Attribute::SExt);
 
                args.emplace_back(module::argument::scalar, arg_api_size,
                                  target_size, target_align,