diff --git a/src/compiler/parse.c b/src/compiler/parse.c
index e36a0e5..bd9de4a 100644
--- a/src/compiler/parse.c
+++ b/src/compiler/parse.c
@@ -491,7 +491,8 @@ static inline TokenKind current(Context *ctx)
 	return current_token(ctx)->kind;
 }
 
-#if 0
+// Compile with -DDEBUG to get debugging messages printed to stderr.
+#ifdef DEBUG
 
 #include <stdio.h>
 
@@ -2103,4 +2104,4 @@ static Node *parse_dowhile_statement(Context *ctx)
 	}
 
 	return (Node*) dowhl;
-}
\ No newline at end of file
+}