diff --git a/cranelift/codegen/src/isa/mod.rs b/cranelift/codegen/src/isa/mod.rs
index 20e38ddeb4..c36d29ce2b 100644
--- a/cranelift/codegen/src/isa/mod.rs
+++ b/cranelift/codegen/src/isa/mod.rs
@@ -88,18 +88,17 @@ pub mod registers;
 mod stack;
 
 /// Returns a builder that can create a corresponding `TargetIsa`
-/// or `Err(LookupError::Unsupported)` if not enabled.
+/// or `Err(LookupError::SupportDisabled)` if not enabled.
 macro_rules! isa_builder {
-    ($name:ident, $feature:tt) => {{
+    ($name: ident, $feature: tt, $triple: ident) => {{
         #[cfg(feature = $feature)]
-        fn $name(triple: Triple) -> Result<Builder, LookupError> {
-            Ok($name::isa_builder(triple))
-        };
+        {
+            Ok($name::isa_builder($triple))
+        }
         #[cfg(not(feature = $feature))]
-        fn $name(_triple: Triple) -> Result<Builder, LookupError> {
+        {
             Err(LookupError::SupportDisabled)
         }
-        $name
     }};
 }
 
@@ -107,12 +106,12 @@ macro_rules! isa_builder {
 /// Return a builder that can create a corresponding `TargetIsa`.
 pub fn lookup(triple: Triple) -> Result<Builder, LookupError> {
     match triple.architecture {
-        Architecture::Riscv32 | Architecture::Riscv64 => isa_builder!(riscv, "riscv")(triple),
+        Architecture::Riscv32 | Architecture::Riscv64 => isa_builder!(riscv, "riscv", triple),
         Architecture::I386 | Architecture::I586 | Architecture::I686 | Architecture::X86_64 => {
-            isa_builder!(x86, "x86")(triple)
+            isa_builder!(x86, "x86", triple)
         }
-        Architecture::Arm { .. } => isa_builder!(arm32, "arm32")(triple),
-        Architecture::Aarch64 { .. } => isa_builder!(arm64, "arm64")(triple),
+        Architecture::Arm { .. } => isa_builder!(arm32, "arm32", triple),
+        Architecture::Aarch64 { .. } => isa_builder!(arm64, "arm64", triple),
         _ => Err(LookupError::Unsupported),
     }
 }