diff --git a/parser.cpp b/parser.cpp
index 99083b0..3f5aa3a 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -96,6 +96,7 @@ static int num_constants;
 */
 
 static bool parser_finished = false;
+static bool global_closed = false;
 
 /****************************************************************************************/
 /* GENERIC FUNCTIONS																	*/	
@@ -507,6 +508,10 @@ static void parse_struct() {
 }
 
 static void parse_function() {
+	if (!global_closed) {
+		emmit(OP_RET);
+		global_closed = true;
+	}
 	EXPECT(TOKEN_IDENTIFIER, "Expected identifier");
 	const std::string function_name = tkn_get_string();
 	if (identifier_exists(function_name)) HALT("Identifier already exists");
@@ -832,11 +837,11 @@ static void parse_global_statements() {
 		current_line = tkn_get_line();
 		switch (tkn_get_token()) {
 		case TOKEN_CONST:
-			tkn_next(); parse_const(); break;
+			tkn_next(); if (!global_closed) { parse_const(); } else { HALT("Global constants must be defined before functions"); } break;
 		case TOKEN_VAR:
-			tkn_next(); parse_var(); break;
+			tkn_next(); if (!global_closed) { parse_var(); } else { HALT("Global variables must be defined before functions"); } break;
 		case TOKEN_STRUCT:
-			tkn_next(); parse_struct(); break;
+			tkn_next(); if (!global_closed) { parse_struct(); } else { HALT("Structs must be defined before functions") } break;
 		case TOKEN_FUNCTION:
 			tkn_next(); parse_function(); break;
 		case TOKEN_REM: