diff --git a/.config/zsh/zshrc.d/40-functions.zsh b/.config/zsh/zshrc.d/40-functions.zsh
index 549c8d4..56ea924 100644
--- a/.config/zsh/zshrc.d/40-functions.zsh
+++ b/.config/zsh/zshrc.d/40-functions.zsh
@@ -630,3 +630,8 @@ pdfunite() {
 
 	command "$@"
 }
+
+# List pids of processes that use an open file
+psofof() {
+	lsof "$@" | tail -n +2 | awk '{ print $2 }'
+}