diff --git src/wp-includes/template.php src/wp-includes/template.php
index 380bb47..14e7eba 100644
--- src/wp-includes/template.php
+++ src/wp-includes/template.php
@@ -174,8 +174,9 @@ function get_category_template() {
 
 	$templates = array();
 
-	if ( ! empty( $category->slug ) ) {
-		$templates[] = "category-{$category->slug}.php";
+  if ( ! empty( $category->slug ) ) {
+    $decoded_slug = urldecode($category->slug);
+		$templates[] = "category-{$decoded_slug}.php";
 		$templates[] = "category-{$category->term_id}.php";
 	}
 	$templates[] = 'category.php';