diff --git a/lib/identify.c b/lib/identify.c
index d3631d0..90f41ff 100644
--- a/lib/identify.c
+++ b/lib/identify.c
@@ -170,14 +170,14 @@ static void flood_fill_seed(struct quirc *q,
 
 	/* Set up the first context  */
 	next_vars = stack;
-	next_vars->x = x0;
+	next_vars->left = x0;
 	next_vars->y = y0;
 
 call:
 	vars = next_vars;
 
 	/* Fill the extent */
-	flood_fill_line(q, vars->x, vars->y, from, to, &vars->left,
+	flood_fill_line(q, vars->left, vars->y, from, to, &vars->left,
 			&vars->right);
 
 	if (func)
@@ -199,7 +199,7 @@ call:
 
 				/* Set up the next context */
 				next_vars = vars + 1;
-				next_vars->x = i;
+				next_vars->left = i;
 				next_vars->y = vars->y - 1;
 				goto call;
 return_from_call1: ;
@@ -217,7 +217,7 @@ return_from_call1: ;
 
 				/* Set up the next context */
 				next_vars = vars + 1;
-				next_vars->x = i;
+				next_vars->left = i;
 				next_vars->y = vars->y + 1;
 				goto call;
 return_from_call2: ;
diff --git a/lib/quirc_internal.h b/lib/quirc_internal.h
index a94d8e9..ed23319 100644
--- a/lib/quirc_internal.h
+++ b/lib/quirc_internal.h
@@ -78,7 +78,6 @@ struct quirc_grid {
 };
 
 struct quirc_flood_fill_vars {
-	int x;
 	int y;
 	int right;
 	int left;