diff --git a/Minesweeper/Core/Src/spielfeld.c b/Minesweeper/Core/Src/spielfeld.c
index cb6c7e3..700643a 100644
--- a/Minesweeper/Core/Src/spielfeld.c
+++ b/Minesweeper/Core/Src/spielfeld.c
@@ -200,7 +200,8 @@ int** revealCell(int** gameBoard, int** hiddenGameBoard, int size, int row, int
 }
 
 void setFlag(int** hiddenGameBoard, int row, int col) {
-    if (hiddenGameBoard[row][col] = FLAG_CELL){
+    if (hiddenGameBoard[row][col] == FLAG_CELL)
+    {
     	hiddenGameBoard[row][col] = HIDDEN_CELL;
     }
     else{