diff --git a/cmake/macros/Interrogate.cmake b/cmake/macros/Interrogate.cmake
index 1e0134e5ff..7114d9b762 100644
--- a/cmake/macros/Interrogate.cmake
+++ b/cmake/macros/Interrogate.cmake
@@ -334,5 +334,5 @@ endfunction(add_python_module)
 if(INTERROGATE_PYTHON_INTERFACE AND BUILD_SHARED_LIBS)
   # The Interrogate path needs to be installed to the architecture-dependent
   # Python directory.
-  install_python_package("${PROJECT_BINARY_DIR}/panda3d")
+  install_python_package("${PROJECT_BINARY_DIR}/panda3d" ARCH)
 endif()