diff --git a/fisher.fish b/fisher.fish
index f3a6add..ec5c4f7 100644
--- a/fisher.fish
+++ b/fisher.fish
@@ -9,7 +9,7 @@ switch (command uname)
         end
     case \*
         function _fisher_now -a elapsed
-            command date "+%s%3N" | command awk "{ sub(/3N\$/,\"000\"); print \$0 - 0$elapsed }"
+            command date "+%s%3N" | command awk -v ELAPSED="$elapsed" '{ sub(/%?3N$/, "000") } $0 -= ELAPSED'
         end
 end