diff --git a/source/core/sequence.cpp b/source/core/sequence.cpp
index 7e59719..316427b 100644
--- a/source/core/sequence.cpp
+++ b/source/core/sequence.cpp
@@ -70,8 +70,7 @@ export namespace core {
 			usize const updated_fill = this->filled + source_elements.length;
 
 			if (updated_fill >= this->elements.length) {
-				append_result const result =
-					this->reserve(max(this->elements.length, updated_fill));
+				append_result const result = this->reserve(updated_fill);
 
 				if (result != append_result::ok) return result;
 			}
@@ -155,7 +154,7 @@ export namespace core {
 		 * `initial_capacity` argument.
 		 */
 		append_result reserve(usize capacity) {
-			usize const requested_capacity = this->elements.length + capacity;
+			usize const requested_capacity = this->filled + capacity;
 
 			if (this->is_dynamic()) {
 				// Grow dynamic buffer (bailing out if failed).