diff --git a/src/fields/fp.rs b/src/fields/fp.rs
index 332598b..0c0028c 100644
--- a/src/fields/fp.rs
+++ b/src/fields/fp.rs
@@ -325,7 +325,7 @@ impl Fp {
     }
 
     #[allow(clippy::too_many_arguments)]
-    #[inline(always)]
+    #[cfg_attr(not(feature = "uninline-portable"), inline(always))]
     const fn montgomery_reduce(
         r0: u64,
         r1: u64,
diff --git a/src/fields/fq.rs b/src/fields/fq.rs
index c0296c4..4d80c69 100644
--- a/src/fields/fq.rs
+++ b/src/fields/fq.rs
@@ -325,7 +325,7 @@ impl Fq {
     }
 
     #[allow(clippy::too_many_arguments)]
-    #[inline(always)]
+    #[cfg_attr(not(feature = "uninline-portable"), inline(always))]
     const fn montgomery_reduce(
         r0: u64,
         r1: u64,