diff --git a/recipes/recipes_emscripten/boost-cpp/recipe.yaml b/recipes/recipes_emscripten/boost-cpp/recipe.yaml
index a69c77d21..d4c2d614b 100644
--- a/recipes/recipes_emscripten/boost-cpp/recipe.yaml
+++ b/recipes/recipes_emscripten/boost-cpp/recipe.yaml
@@ -6,7 +6,7 @@ package:
   version: ${{ version }}
 
 source:
-  url: https://boostorg.jfrog.io/artifactory/main/release/{{ version }}/source/boost_{{ version|replace(".", "_") }}.tar.bz2
+  url: https://boostorg.jfrog.io/artifactory/main/release/{{ version }}/source/boost_{{ version.replace(".", "_") }}.tar.bz2
   sha256: 79e6d3f986444e5a80afbeccdaf2d1c1cf964baa8d766d20859d653a16c39848
   # patches:
   # - 0001-config-libcpp15.patch