diff --git a/lib/pure/fenv.nim b/lib/pure/fenv.nim
index fd0eab3104..f8f115eccc 100644
--- a/lib/pure/fenv.nim
+++ b/lib/pure/fenv.nim
@@ -104,7 +104,7 @@ proc feupdateenv*(envp: ptr Tfenv): cint {.importc, header: "<fenv.h>".}
 
 var FP_RADIX_INTERNAL {. importc: "FLT_RADIX" header: "<float.h>" .} : int
 
-template fpRadix* : int = FLT_RADIX_INTERNAL
+template fpRadix* : int = FP_RADIX_INTERNAL
   ## The (integer) value of the radix used to represent any floating
   ## point type on the architecture used to build the program.