diff --git a/state.c b/state.c
index 4de1d3a0..0a752438 100644
--- a/state.c
+++ b/state.c
@@ -2347,9 +2347,6 @@ static void state_read_binary(struct snapraid_state* state, const char* path, ST
 			}
 			disk = tommy_array_get(&disk_mapping, mapping);
 
-			/* grow the array */
-			tommy_array_grow(&disk->blockarr, blockmax);
-
 			v_pos = 0;
 			while (v_pos < blockmax) {
 				uint32_t v_count;
@@ -2371,6 +2368,9 @@ static void state_read_binary(struct snapraid_state* state, const char* path, ST
 
 				switch (c) {
 				case 'o' :
+					/* grow the array */
+					tommy_array_grow(&disk->blockarr, v_pos + v_count);
+
 					/* if it's a run of deleted blocks */
 					while (v_count) {
 						struct snapraid_deleted* deleted;