diff --git a/share/completions/math.fish b/share/completions/math.fish
new file mode 100644
index 000000000..a448f374b
--- /dev/null
+++ b/share/completions/math.fish
@@ -0,0 +1,2 @@
+complete -f -c math -r
+complete -f -c math -s s -l scale -r