diff --git a/engines/director/lingo/lingo-code.cpp b/engines/director/lingo/lingo-code.cpp
index 7f51be57d4b8..11804c2dc16d 100644
--- a/engines/director/lingo/lingo-code.cpp
+++ b/engines/director/lingo/lingo-code.cpp
@@ -98,7 +98,7 @@ void Lingo::c_varpush() {
 		sym = new Symbol;
 		sym->name = (char *)calloc(strlen(name) + 1, 1);
 		Common::strlcpy(sym->name, name, strlen(name) + 1);
-		sym->type = UNDEF;
+		sym->type = VOID;
 		sym->u.val = 0;
 
 		g_lingo->_vars[name] = sym;
@@ -118,7 +118,7 @@ void Lingo::c_assign() {
 	d1 = g_lingo->pop();
 	d2 = g_lingo->pop();
 
-	if (d1.sym->type != VAR && d1.sym->type != UNDEF) {
+	if (d1.sym->type != VAR && d1.sym->type != VOID) {
 		warning("assignment to non-variable '%s'", d1.sym->name);
 		return;
 	}
@@ -129,13 +129,13 @@ void Lingo::c_assign() {
 }
 
 bool Lingo::verify(Symbol *s) {
-	if (s->type != VAR && s->type != UNDEF) {
+	if (s->type != VAR && s->type != VOID) {
 		warning("attempt to evaluate non-variable '%s'", s->name);
 
 		return false;
 	}
 
-	if (s->type == UNDEF) {
+	if (s->type == VOID) {
 		warning("undefined variable '%s'", s->name);
 
 		return false;
diff --git a/engines/director/lingo/lingo-gr.cpp b/engines/director/lingo/lingo-gr.cpp
index c8f1fabbee00..7d7bf1d41cc1 100644
--- a/engines/director/lingo/lingo-gr.cpp
+++ b/engines/director/lingo/lingo-gr.cpp
@@ -67,7 +67,7 @@
       know about them.  */
    enum yytokentype {
      UNARY = 258,
-     UNDEF = 259,
+     VOID = 259,
      INT = 260,
      FLOAT = 261,
      VAR = 262,
@@ -99,7 +99,7 @@
 #endif
 /* Tokens.  */
 #define UNARY 258
-#define UNDEF 259
+#define VOID 259
 #define INT 260
 #define FLOAT 261
 #define VAR 262
@@ -511,7 +511,7 @@ static const yytype_uint8 yyrline[] =
    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
 static const char *const yytname[] =
 {
-  "$end", "error", "$undefined", "UNARY", "UNDEF", "INT", "FLOAT", "VAR",
+  "$end", "error", "$undefined", "UNARY", "VOID", "INT", "FLOAT", "VAR",
   "STRING", "tIF", "tELSE", "tEND", "tFRAME", "tGO", "tINTO", "tLOOP",
   "tMCI", "tMCIWAIT", "tMOVIE", "tNEXT", "tOF", "tPREVIOUS", "tPUT",
   "tSET", "tTHEN", "tTO", "tGE", "tLE", "tGT", "tLT", "tEQ", "tNEQ", "'='",
@@ -1937,6 +1937,6 @@ yyparse ()
 }
 
 
-#line 215 "engines/director/lingo/lingo-gr.y"
+#line 228 "engines/director/lingo/lingo-gr.y"
 
 
diff --git a/engines/director/lingo/lingo-gr.h b/engines/director/lingo/lingo-gr.h
index 581f3d236e69..797826974e82 100644
--- a/engines/director/lingo/lingo-gr.h
+++ b/engines/director/lingo/lingo-gr.h
@@ -40,7 +40,7 @@
       know about them.  */
    enum yytokentype {
      UNARY = 258,
-     UNDEF = 259,
+     VOID = 259,
      INT = 260,
      FLOAT = 261,
      VAR = 262,
@@ -72,7 +72,7 @@
 #endif
 /* Tokens.  */
 #define UNARY 258
-#define UNDEF 259
+#define VOID 259
 #define INT 260
 #define FLOAT 261
 #define VAR 262
diff --git a/engines/director/lingo/lingo-gr.y b/engines/director/lingo/lingo-gr.y
index 582ff5309f5c..8d205b8ae158 100644
--- a/engines/director/lingo/lingo-gr.y
+++ b/engines/director/lingo/lingo-gr.y
@@ -69,7 +69,7 @@ using namespace Director;
 	int code;
 }
 
-%token UNARY UNDEF
+%token UNARY VOID
 %token<i> INT
 %token<f> FLOAT
 %token<s> VAR STRING
diff --git a/engines/director/lingo/lingo.cpp b/engines/director/lingo/lingo.cpp
index 25b449591ec6..fee23d1e346a 100644
--- a/engines/director/lingo/lingo.cpp
+++ b/engines/director/lingo/lingo.cpp
@@ -69,7 +69,7 @@ struct EventHandlerType {
 
 Symbol::Symbol() {
 	name = NULL;
-	type = UNDEF;
+	type = VOID;
 	u.str = NULL;
 }