diff --git a/libchisel/src/imports.rs b/libchisel/src/imports.rs
index 4fc610c..9dab29f 100644
--- a/libchisel/src/imports.rs
+++ b/libchisel/src/imports.rs
@@ -137,6 +137,11 @@ impl<'a> ModulePreset for ImportList<'a> {
                     "getCodeSize",
                     FunctionType::new(vec![], Some(ValueType::I32)),
                 ),
+                ImportType::Function(
+                    "ethereum",
+                    "getExternalCodeSize",
+                    FunctionType::new(vec![ValueType::I32], Some(ValueType::I32)),
+                ),
                 ImportType::Function(
                     "ethereum",
                     "externalCodeCopy",
@@ -150,6 +155,11 @@ impl<'a> ModulePreset for ImportList<'a> {
                         None,
                     ),
                 ),
+                ImportType::Function(
+                    "ethereum",
+                    "codeCopy",
+                    FunctionType::new(vec![ValueType::I32, ValueType::I32, ValueType::I32], None),
+                ),
                 ImportType::Function(
                     "ethereum",
                     "getCaller",