diff --git a/library/compiler-builtins/libm/src/math/lgamma_r.rs b/library/compiler-builtins/libm/src/math/lgamma_r.rs
index 382a501fc3dc..9533e882cc99 100644
--- a/library/compiler-builtins/libm/src/math/lgamma_r.rs
+++ b/library/compiler-builtins/libm/src/math/lgamma_r.rs
@@ -270,9 +270,9 @@ pub fn lgamma_r(mut x: f64) -> (f64, i32) {
                 p2 = 1.0 + y * (V1 + y * (V2 + y * (V3 + y * (V4 + y * V5))));
                 r += -0.5 * y + p1 / p2;
             }
-            #[cfg(feature = "checked")]
+            #[cfg(debug_assertions)]
             _ => unreachable!(),
-            #[cfg(not(feature = "checked"))]
+            #[cfg(not(debug_assertions))]
             _ => {}
         }
     } else if ix < 0x40200000 {
diff --git a/library/compiler-builtins/libm/src/math/lgammaf_r.rs b/library/compiler-builtins/libm/src/math/lgammaf_r.rs
index 0745359a257d..c5e559f46528 100644
--- a/library/compiler-builtins/libm/src/math/lgammaf_r.rs
+++ b/library/compiler-builtins/libm/src/math/lgammaf_r.rs
@@ -205,9 +205,9 @@ pub fn lgammaf_r(mut x: f32) -> (f32, i32) {
                 p2 = 1.0 + y * (V1 + y * (V2 + y * (V3 + y * (V4 + y * V5))));
                 r += -0.5 * y + p1 / p2;
             }
-            #[cfg(feature = "checked")]
+            #[cfg(debug_assertions)]
             _ => unreachable!(),
-            #[cfg(not(feature = "checked"))]
+            #[cfg(not(debug_assertions))]
             _ => {}
         }
     } else if ix < 0x41000000 {
diff --git a/library/compiler-builtins/libm/src/math/rem_pio2_large.rs b/library/compiler-builtins/libm/src/math/rem_pio2_large.rs
index 8533dc28948d..002ce2e211f2 100644
--- a/library/compiler-builtins/libm/src/math/rem_pio2_large.rs
+++ b/library/compiler-builtins/libm/src/math/rem_pio2_large.rs
@@ -461,9 +461,9 @@ pub(crate) fn rem_pio2_large(x: &[f64], y: &mut [f64], e0: i32, prec: usize) ->
                 i!(y, 2, =, -fw);
             }
         }
-        #[cfg(feature = "checked")]
+        #[cfg(debug_assertions)]
         _ => unreachable!(),
-        #[cfg(not(feature = "checked"))]
+        #[cfg(not(debug_assertions))]
         _ => {}
     }
     n & 7
diff --git a/library/compiler-builtins/libm/src/math/sincos.rs b/library/compiler-builtins/libm/src/math/sincos.rs
index 750908df4f7e..d49f65c97079 100644
--- a/library/compiler-builtins/libm/src/math/sincos.rs
+++ b/library/compiler-builtins/libm/src/math/sincos.rs
@@ -51,9 +51,9 @@ pub fn sincos(x: f64) -> (f64, f64) {
         1 => (c, -s),
         2 => (-s, -c),
         3 => (-c, s),
-        #[cfg(feature = "checked")]
+        #[cfg(debug_assertions)]
         _ => unreachable!(),
-        #[cfg(not(feature = "checked"))]
+        #[cfg(not(debug_assertions))]
         _ => (0.0, 1.0),
     }
 }
diff --git a/library/compiler-builtins/libm/src/math/sincosf.rs b/library/compiler-builtins/libm/src/math/sincosf.rs
index bb9a00392017..d4e0772d5b10 100644
--- a/library/compiler-builtins/libm/src/math/sincosf.rs
+++ b/library/compiler-builtins/libm/src/math/sincosf.rs
@@ -115,9 +115,9 @@ pub fn sincosf(x: f32) -> (f32, f32) {
         1 => (c, -s),
         2 => (-s, -c),
         3 => (-c, s),
-        #[cfg(feature = "checked")]
+        #[cfg(debug_assertions)]
         _ => unreachable!(),
-        #[cfg(not(feature = "checked"))]
+        #[cfg(not(debug_assertions))]
         _ => (0.0, 1.0),
     }
 }