diff --git a/share/completions/pipenv.fish b/share/completions/pipenv.fish
index 7d5c2941d..45ae4ed25 100644
--- a/share/completions/pipenv.fish
+++ b/share/completions/pipenv.fish
@@ -1,4 +1,5 @@
 if command -sq pipenv
-    # pipenv determines which completions to print via $SHELL, so override it for this.
-    SHELL=(status fish-path) pipenv --completion 2>/dev/null | source
+    # pipenv determines which completions to print via some automagic that might not be perfect.
+    # Force it to be correct.
+    _PIPENV_COMPLETE=source-fish  pipenv --completion 2>/dev/null | source
 end