diff --git a/src/libcore/f32.rs b/src/libcore/f32.rs
index 95538d7c3b9..59225b0d5db 100644
--- a/src/libcore/f32.rs
+++ b/src/libcore/f32.rs
@@ -13,7 +13,7 @@ export is_zero, is_infinite, is_finite;
 export NaN, is_NaN, infinity, neg_infinity;
 export consts;
 export logarithm;
-export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh;
+export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh, floor;
 export erf, erfc, exp, expm1, exp2, abs, abs_sub;
 export mul_add, fmax, fmin, nextafter, frexp, hypot, ldexp;
 export lgamma, ln, log_radix, ln1p, log10, log2, ilog_radix;
diff --git a/src/libcore/f64.rs b/src/libcore/f64.rs
index 6db74766387..e36ccec191b 100644
--- a/src/libcore/f64.rs
+++ b/src/libcore/f64.rs
@@ -13,7 +13,7 @@ export is_zero, is_infinite, is_finite;
 export NaN, is_NaN, infinity, neg_infinity;
 export consts;
 export logarithm;
-export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh;
+export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh, floor;
 export erf, erfc, exp, expm1, exp2, abs, abs_sub;
 export mul_add, fmax, fmin, nextafter, frexp, hypot, ldexp;
 export lgamma, ln, log_radix, ln1p, log10, log2, ilog_radix;
diff --git a/src/libcore/float.rs b/src/libcore/float.rs
index ffa56129d4f..96968f14cbb 100644
--- a/src/libcore/float.rs
+++ b/src/libcore/float.rs
@@ -11,7 +11,7 @@ export is_zero, is_infinite, is_finite;
 export NaN, is_NaN, infinity, neg_infinity;
 export consts;
 export logarithm;
-export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh;
+export acos, asin, atan, atan2, cbrt, ceil, copysign, cos, cosh, floor;
 export erf, erfc, exp, expm1, exp2, abs, abs_sub;
 export mul_add, fmax, fmin, nextafter, frexp, hypot, ldexp;
 export lgamma, ln, log_radix, ln1p, log10, log2, ilog_radix;