diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..715e624
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+.revision-hash export-subst
diff --git a/.revision-hash b/.revision-hash
new file mode 100644
index 0000000..6828f88
--- /dev/null
+++ b/.revision-hash
@@ -0,0 +1 @@
+$Format:%H$
diff --git a/.version b/.version
new file mode 100644
index 0000000..0ba2319
--- /dev/null
+++ b/.version
@@ -0,0 +1 @@
+0.3.0-dev
\ No newline at end of file
diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
index ce9db28..a65b29f 100644
--- a/zsh-syntax-highlighting.zsh
+++ b/zsh-syntax-highlighting.zsh
@@ -29,6 +29,17 @@
 # -------------------------------------------------------------------------------------------------
 
 
+if [[ -o function_argzero ]]; then
+  # $0 is reliable
+  ZSH_HIGHLIGHT_VERSION=$(<"$0:h"/.version)
+else
+  # $0 is unreliable, so the call to _zsh_highlight_load_highlighters will fail.
+  # TODO: If 'zmodload zsh/parameter' is available, ${funcsourcetrace[1]%:*} might serve as a substitute?
+  # TODO: also check POSIX_ARGZERO, but not it's not available in older zsh
+  echo "zsh-syntax-highlighting: error: not compatible with FUNCTION_ARGZERO" >&2
+  return 1
+fi
+
 # -------------------------------------------------------------------------------------------------
 # Core highlighting update system
 # -------------------------------------------------------------------------------------------------