diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b106df..398190f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### 0.4.58 (2024-08-26)
 
 - Fixed `YulFunctionDefinition.parameters` and `returnVariables`: made optional, used when empty.
+- Fixed `InlineAssembly.externalReferences[].suffix`: added `'length'` option.
 
 ### 0.4.57 (2024-07-16)
 
diff --git a/scripts/build-schema.js b/scripts/build-schema.js
index 2c2d2c4..b1d37ca 100644
--- a/scripts/build-schema.js
+++ b/scripts/build-schema.js
@@ -498,7 +498,7 @@ const schema = {
           isSlot: boolean,
           src: ref('SourceLocation'),
           valueSize: integer,
-          suffix: optional(literal('slot', 'offset')),
+          suffix: optional(literal('slot', 'offset', 'length')),
         })),
         flags: optional(array(literal('memory-safe'))),
       },
diff --git a/test/sources/asm-0.7.5.sol b/test/sources/asm-0.7.5.sol
new file mode 100644
index 0000000..896b974
--- /dev/null
+++ b/test/sources/asm-0.7.5.sol
@@ -0,0 +1,9 @@
+pragma solidity >=0.7.5;
+
+contract Asm {
+    function foo(bytes calldata b) external {
+        assembly {
+            let z := b.length
+        }
+    }
+}
diff --git a/test/sources/asm-0.7.sol b/test/sources/asm-0.7.sol
index b41c697..c9dcf8d 100644
--- a/test/sources/asm-0.7.sol
+++ b/test/sources/asm-0.7.sol
@@ -3,7 +3,7 @@ pragma solidity >=0.7;
 contract Asm {
     uint s;
 
-    function foo() external {
+    function foo(bytes calldata b) external {
         assembly {
             let x := s.slot
             let y := s.offset