diff --git a/src/master.c b/src/master.c
index daeec2e..9954bb1 100644
--- a/src/master.c
+++ b/src/master.c
@@ -48,7 +48,7 @@ int perfect_rolls() {
 
 	int nb_coeffs = 4;
 	double y1, y2, y3, y4;
-	int a[4] = {0};
+	int a[5] = {0};
 	glp_smcp params = {0};
 	glp_init_smcp(&params);
 	params.msg_lev = GLP_MSG_OFF;
diff --git a/src/sub.c b/src/sub.c
index ce1bd2e..8a50db8 100644
--- a/src/sub.c
+++ b/src/sub.c
@@ -15,7 +15,7 @@ static void add_column_sp(glp_prob *lp, int *num_col_sp) {
 }
 
 
-void column_generator(int y1, int y2, int y3, int y4, int a[static 4]) {
+void column_generator(int y1, int y2, int y3, int y4, int a[static 5]) {
 	glp_prob *sous_prob;
 	int ia[1 + 1000];
 	int ja[1 + 1000];
diff --git a/src/sub.h b/src/sub.h
index bf2d669..7f17ded 100644
--- a/src/sub.h
+++ b/src/sub.h
@@ -2,7 +2,7 @@
 #define SUB_H
 
 
-void column_generator(int y1, int y2, int y3, int y4, int a[static 4]);
+void column_generator(int y1, int y2, int y3, int y4, int a[static 5]);
 
 
 #endif