diff --git a/platforms/js/build_js.py b/platforms/js/build_js.py
index afe37c6949..37ff956de2 100644
--- a/platforms/js/build_js.py
+++ b/platforms/js/build_js.py
@@ -77,7 +77,9 @@ class Builder:
             rm_one(d)
 
     def get_cmake_cmd(self):
-        cmd = ["cmake",
+        cmd = [
+            "cmake",
+            "-DPYTHON_DEFAULT_EXECUTABLE=%s" % sys.executable,
                "-DENABLE_PIC=FALSE", # To workaround emscripten upstream backend issue https://github.com/emscripten-core/emscripten/issues/8761
                "-DCMAKE_BUILD_TYPE=Release",
                "-DCMAKE_TOOLCHAIN_FILE='%s'" % self.get_toolchain_file(),