diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index fc39640f2dea2fa08be434c87fd4df1b17ed59d7..7e3c53a900d8efe75796c8e35a9f14f91b1a8fd8 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -15,7 +15,7 @@ struct _ddebug {
 	const char *function;
 	const char *filename;
 	const char *format;
-	unsigned int lineno:24;
+	unsigned int lineno:18;
 	/*
  	 * The flags field controls the behaviour at the callsite.
  	 * The bits here are changed dynamically when the user