diff --git a/lib/pure/math.nim b/lib/pure/math.nim
index 97c7b0e052..0f6a07f135 100644
--- a/lib/pure/math.nim
+++ b/lib/pure/math.nim
@@ -14,7 +14,7 @@
 ## <backends.html#the-javascript-target>`_.
 
 include "system/inclrtl"
-
+import "impure/fenv"
 {.push debugger:off .} # the user does not want to trace a part
                        # of the standard library!