diff --git a/src/text_object.cc b/src/text_object.cc
index 8b5e303..90dfdd8 100644
--- a/src/text_object.cc
+++ b/src/text_object.cc
@@ -153,7 +153,7 @@ void textObjectsSetLineDelay(double value)
 
 // text_object_create
 // 0x4B036C
-int textObjectAdd(Object* object, char* string, int font, int color, int a5, Rect* rect)
+int textObjectAdd(Object* object, char* string, int font, int color, int outlineColor, Rect* rect)
 {
     if (!gTextObjectsInitialized) {
         return -1;
@@ -214,7 +214,7 @@ int textObjectAdd(Object* object, char* string, int font, int color, int a5, Rec
 
     textObject->height = (fontGetLineHeight() + 1) * textObject->linesCount;
 
-    if (a5 != -1) {
+    if (outlineColor != -1) {
         textObject->width += 2;
         textObject->height += 2;
     }
@@ -231,7 +231,7 @@ int textObjectAdd(Object* object, char* string, int font, int color, int a5, Rec
     unsigned char* dest = textObject->data;
     int skip = textObject->width * (fontGetLineHeight() + 1);
 
-    if (a5 != -1) {
+    if (outlineColor != -1) {
         dest += textObject->width;
     }
 
@@ -253,8 +253,8 @@ int textObjectAdd(Object* object, char* string, int font, int color, int a5, Rec
         dest += skip;
     }
 
-    if (a5 != -1) {
-        bufferOutline(textObject->data, textObject->width, textObject->height, textObject->width, a5);
+    if (outlineColor != -1) {
+        bufferOutline(textObject->data, textObject->width, textObject->height, textObject->width, outlineColor);
     }
 
     if (object != NULL) {
diff --git a/src/text_object.h b/src/text_object.h
index 08f3b84..17c4e34 100644
--- a/src/text_object.h
+++ b/src/text_object.h
@@ -13,7 +13,7 @@ void textObjectsDisable();
 void textObjectsEnable();
 void textObjectsSetBaseDelay(double value);
 void textObjectsSetLineDelay(double value);
-int textObjectAdd(Object* object, char* string, int font, int color, int a5, Rect* rect);
+int textObjectAdd(Object* object, char* string, int font, int color, int outlineColor, Rect* rect);
 void textObjectsRenderInRect(Rect* rect);
 int textObjectsGetCount();
 void textObjectsRemoveByOwner(Object* object);