diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 8ae7c9aa9c..45ea87831f 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -549,6 +549,7 @@ pub fn (mut a array) shift() voidptr {
 	unsafe {
 		a.data = &u8(a.data) + u64(a.element_size)
 	}
+	a.offset += a.element_size
 	a.len--
 	a.cap--
 	return first_elem
diff --git a/vlib/builtin/array_d_gcboehm_opt.v b/vlib/builtin/array_d_gcboehm_opt.v
index b6422e79ac..b660fe1e05 100644
--- a/vlib/builtin/array_d_gcboehm_opt.v
+++ b/vlib/builtin/array_d_gcboehm_opt.v
@@ -125,6 +125,7 @@ fn (mut a array) ensure_cap_noscan(required int) {
 		unsafe { vmemcpy(new_data, a.data, u64(a.len) * u64(a.element_size)) }
 		// TODO: the old data may be leaked when no GC is used (ref-counting?)
 	}
+	a.offset += a.element_size
 	a.data = new_data
 	a.offset = 0
 	a.cap = int(cap)