diff --git a/src/cluster_research.c b/src/cluster_research.c
index d39a9cb..6be00cf 100644
--- a/src/cluster_research.c
+++ b/src/cluster_research.c
@@ -183,7 +183,7 @@ int main (void) {
 	for (i = 0; i < z; i++) {
 		counter = 1;
 						for (l = 0; l < 2; l++) {
-					if (grid[17 - i - l][i + k + 1 + l] == grid[17 - i - 1 - l][i + k + 2 + l] && grid[17 - i -1][i + k + 2] != 0) {
+					if (grid[17 - i - l][i + k + 1 + l] == grid[17 - i - 1 - l][i + k + 2 + l] && grid[17 - i -1 - l][i + k + 2 + l] != 0) {
 						counter = counter + 1;
 					}
 //			printf("[y1: %i], [x1: %i] [y2: %i] [x2: %i]\n", 17-i-l, i+k+1+l, 17-i-1-l, i+k+2+l);