1 files changed, 1 insertions, 0 deletions
diff --git a/shell.h b/shell.h
index ec08688..8b6a4fc 100644
--- a/shell.h
+++ b/shell.h
@@ -89,6 +89,7 @@ extern int debugging_mode;
 extern int executing, login_shell;
 extern int interactive, interactive_shell;
 extern int startup_state;
+extern int shell_compatibility_level;
 
 /* Structure to pass around that holds a bitmap of file descriptors
    to close, and the size of that structure.  Used in execute_cmd.c. */