diff --git a/zsh/.zshrc b/zsh/.zshrc
index f91d1df..a576194 100644
--- a/zsh/.zshrc
+++ b/zsh/.zshrc
@@ -1,3 +1,13 @@
+gs() {
+  if [[ $# -eq 0 ]]; then
+    echo "Refusing to open Ghostscript interactive prompt."
+    echo "Use /usr/bin/gs explicitly if you really want Ghostscript."
+    return 1
+  fi
+
+  command gs "$@"
+}
+
 # Enable Powerlevel10k instant prompt. Should stay close to the top of ~/.zshrc.
 # Initialization code that may require console input (password prompts, [y/n]
 # confirmations, etc.) must go above this block; everything else may go below.