diff --git a/lib/include/vector.h b/lib/include/vector.h
index cf2d2b9..fb644df 100644
--- a/lib/include/vector.h
+++ b/lib/include/vector.h
@@ -30,6 +30,8 @@ struct vector  {
 	void  *base;
 };
 
+#define VECTOR_BLOCK_SIZE 64
+
 #define VECTOR_INIT(block_size) { block_size, 0, 0, NULL }
 
 void vector_init(struct vector* v, size_t block_size);
diff --git a/lib/vector.c b/lib/vector.c
index 15c7f9f..235c89d 100644
--- a/lib/vector.c
+++ b/lib/vector.c
@@ -33,7 +33,7 @@ static void ensure_size(struct vector* v, size_t n) {
 
 void vector_init(struct vector* v, size_t block_size) {
 
-	v->blk_sz = block_size > 0 ? block_size : 64;
+	v->blk_sz = block_size > 0 ? block_size : VECTOR_BLOCK_SIZE;
 	v->alloc  = 0;
 	v->size   = 0;
 	v->base   = NULL;