diff --git a/Source/gmenu.cpp b/Source/gmenu.cpp
index aeaa9d896..85f4715b5 100644
--- a/Source/gmenu.cpp
+++ b/Source/gmenu.cpp
@@ -289,10 +289,10 @@ BOOL gmenu_presskeys(int a1)
 	case VK_SPACE:
 		return FALSE;
 	case VK_LEFT:
-		gmenu_left_right(0);
+		gmenu_left_right(FALSE);
 		break;
 	case VK_RIGHT:
-		gmenu_left_right(1);
+		gmenu_left_right(TRUE);
 		break;
 	case VK_UP:
 		gmenu_up_down(0);
@@ -304,27 +304,23 @@ BOOL gmenu_presskeys(int a1)
 	return TRUE;
 }
 
-void gmenu_left_right(int a1)
+void gmenu_left_right(BOOL isRight)
 {
-	signed int v1;   // edx
-	unsigned int v2; // eax
-	int v3;          // eax
+	int plOffset;
 
-	v1 = sgpCurrItem->dwFlags;
 	if (sgpCurrItem->dwFlags & 0x40000000) {
-		v2 = sgpCurrItem->dwFlags & 0xFFF;
-		if (a1) {
-			if (v2 == ((v1 >> 12) & 0xFFF))
+		plOffset = sgpCurrItem->dwFlags & 0xFFF;
+		if (isRight) {
+			if (plOffset == (int)(sgpCurrItem->dwFlags & 0xFFF000) >> 12)
 				return;
-			v3 = v2 + 1;
+			plOffset++;
 		} else {
-			if (!(v1 & 0xFFF))
+			if (!plOffset)
 				return;
-			v3 = v2 - 1;
+			plOffset--;
 		}
-		_LOWORD(v1) = v1 & 0xF000;
-		sgpCurrItem->dwFlags = v1;
-		sgpCurrItem->dwFlags |= v3;
+		sgpCurrItem->dwFlags &= 0xFFFFF000;
+		sgpCurrItem->dwFlags |= plOffset;
 		sgpCurrItem->fnMenu(FALSE);
 	}
 }
diff --git a/Source/gmenu.h b/Source/gmenu.h
index 6d876037c..2888b01f1 100644
--- a/Source/gmenu.h
+++ b/Source/gmenu.h
@@ -25,7 +25,7 @@ void gmenu_draw_menu_item(TMenuItem *pItem, int a2);
 void gmenu_clear_buffer(int x, int y, int width, int height);
 int gmenu_get_lfont(TMenuItem *pItem);
 BOOL gmenu_presskeys(int a1);
-void gmenu_left_right(int a1);
+void gmenu_left_right(BOOL isRight);
 BOOL gmenu_on_mouse_move();
 BOOLEAN gmenu_valid_mouse_pos(int *plOffset);
 int gmenu_left_mouse(int a1);