diff --git a/share/completions/pip2.fish b/share/completions/pip2.fish
index 6a4dc1c78..76d3a1465 100644
--- a/share/completions/pip2.fish
+++ b/share/completions/pip2.fish
@@ -1,3 +1,3 @@
 if command -sq pip2
-    pip2 completion --fish | sed 's/-c pip$/-c pip2/' | source
+    pip3 completion --fish | string replace -r "\b-c\s+pip\b" -- "-c pip2" | source
 end
diff --git a/share/completions/pip3.fish b/share/completions/pip3.fish
index e2078c761..fd12cc224 100644
--- a/share/completions/pip3.fish
+++ b/share/completions/pip3.fish
@@ -1,3 +1,3 @@
 if command -sq pip3
-    pip3 completion --fish | sed 's/-c pip$/-c pip3/' | source
+    pip3 completion --fish | string replace -r "\b-c\s+pip\b" -- "-c pip3" | source
 end