diff --git a/src/index.js b/src/index.js
index 66539c4..df51a4a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -432,6 +432,12 @@ function transformSvelte(ast, { env, changes }) {
   for (let child of ast.children ?? []) {
     transformSvelte(child, { env, changes })
   }
+
+  if (ast.type === 'IfBlock') {
+    for (let child of ast.else?.children ?? []) {
+      transformSvelte(child, { env, changes })
+    }
+  }
 }
 
 // https://lihautan.com/manipulating-ast-with-javascript/
diff --git a/tests/test.js b/tests/test.js
index 9d7b1b6..63e25e8 100644
--- a/tests/test.js
+++ b/tests/test.js
@@ -165,6 +165,7 @@ let tests = {
     t`<div class={\`${no}\${someVar}${no}\`} />`,
     t`<div class="${yes} {\`${yes}\`}" />`,
     t`<div let:class={clazz} class="${yes} {clazz}" />`,
+    t`{#if something} <div class="${yes}" /> {:else} <div class="${yes}" /> {/if}`,
     [
       `<div class="sm:block uppercase flex{someVar}" />`,
       `<div class="uppercase sm:block flex{someVar}" />`,