diff --git a/library/compiler-builtins/compiler-builtins/src/lib.rs b/library/compiler-builtins/compiler-builtins/src/lib.rs
index 5dfc6733befec..a884892fc9e21 100644
--- a/library/compiler-builtins/compiler-builtins/src/lib.rs
+++ b/library/compiler-builtins/compiler-builtins/src/lib.rs
@@ -15,8 +15,6 @@
 #![cfg_attr(f16_enabled, feature(f16))]
 #![cfg_attr(f128_enabled, feature(f128))]
 #![cfg_attr(all(target_family = "wasm"), feature(wasm_numeric_instr))]
-//
-#![allow(unstable_name_collisions)] // FIXME(float_bits_const): remove when stable
 #![allow(unused_features)]
 #![allow(internal_features)]
 // `mem::swap` cannot be used because it may generate references to memcpy in unoptimized code.
diff --git a/library/compiler-builtins/libm-test/src/lib.rs b/library/compiler-builtins/libm-test/src/lib.rs
index f2ee03252139e..9827b231a7686 100644
--- a/library/compiler-builtins/libm-test/src/lib.rs
+++ b/library/compiler-builtins/libm-test/src/lib.rs
@@ -1,7 +1,6 @@
 #![cfg_attr(f16_enabled, feature(f16))]
 #![cfg_attr(f128_enabled, feature(f128))]
 #![allow(clippy::unusual_byte_groupings)] // sometimes we group by sign_exp_sig
-#![allow(unstable_name_collisions)] // FIXME(float_bits_const): remove when stable
 
 pub mod builtins_wrapper;
 pub mod domain;
diff --git a/library/compiler-builtins/libm/src/lib.rs b/library/compiler-builtins/libm/src/lib.rs
index 9c323347a04dd..de62514b797d6 100644
--- a/library/compiler-builtins/libm/src/lib.rs
+++ b/library/compiler-builtins/libm/src/lib.rs
@@ -14,8 +14,6 @@
 #![deny(rust_2024_compatibility)]
 #![allow(edition_2024_expr_fragment_specifier)]
 //
-// FIXME(float_bits_const): remove when stable
-#![allow(unstable_name_collisions)]
 // Allow idioms that come from ported C or may be more clear
 #![allow(clippy::assign_op_pattern)]
 #![allow(clippy::int_plus_one)]
diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index db05d7fdc5087..41fbf7462746e 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -160,8 +160,7 @@ impl f128 {
     pub const RADIX: u32 = 2;
 
     /// The size of this float type in bits.
-    // #[unstable(feature = "f128", issue = "116909")]
-    #[unstable(feature = "float_bits_const", issue = "151073")]
+    #[unstable(feature = "f128", issue = "116909")]
     pub const BITS: u32 = 128;
 
     /// Number of significant digits in base 2.
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index 273ef3688ca5f..f309e47683403 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -154,8 +154,7 @@ impl f16 {
     pub const RADIX: u32 = 2;
 
     /// The size of this float type in bits.
-    // #[unstable(feature = "f16", issue = "116909")]
-    #[unstable(feature = "float_bits_const", issue = "151073")]
+    #[unstable(feature = "f16", issue = "116909")]
     pub const BITS: u32 = 16;
 
     /// Number of significant digits in base 2.
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index d3dea38dc2fcf..de9109e8cf7f0 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -408,7 +408,7 @@ impl f32 {
     pub const RADIX: u32 = 2;
 
     /// The size of this float type in bits.
-    #[unstable(feature = "float_bits_const", issue = "151073")]
+    #[stable(feature = "float_bits_const", since = "CURRENT_RUSTC_VERSION")]
     pub const BITS: u32 = 32;
 
     /// Number of significant digits in base 2.
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index 7c5082749cd11..4aa45de23c89b 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -408,7 +408,7 @@ impl f64 {
     pub const RADIX: u32 = 2;
 
     /// The size of this float type in bits.
-    #[unstable(feature = "float_bits_const", issue = "151073")]
+    #[stable(feature = "float_bits_const", since = "CURRENT_RUSTC_VERSION")]
     pub const BITS: u32 = 64;
 
     /// Number of significant digits in base 2.