diff --git a/stdlib/public/runtime/Numeric.cpp b/stdlib/public/runtime/Numeric.cpp
index 40421d0336ef4..ac3933e6b62c6 100644
--- a/stdlib/public/runtime/Numeric.cpp
+++ b/stdlib/public/runtime/Numeric.cpp
@@ -50,12 +50,10 @@ static T convert(IntegerLiteral value) {
   return result;
 }
 
-SWIFT_CC(swift)
 float swift::swift_intToFloat32(IntegerLiteral value) {
   return convert<float>(value);
 }
 
-SWIFT_CC(swift)
 double swift::swift_intToFloat64(IntegerLiteral value) {
   return convert<double>(value);
 }