diff --git a/conan/tools/cmake/cmake.py b/conan/tools/cmake/cmake.py
index d30e4274f0b..716e6afd1d7 100644
--- a/conan/tools/cmake/cmake.py
+++ b/conan/tools/cmake/cmake.py
@@ -56,7 +56,7 @@ def __init__(self, conanfile):
         configure_preset = get_configure_preset(cmake_presets, conanfile)
 
         self._generator = configure_preset["generator"]
-        self._toolchain_file = configure_preset["toolchainFile"]
+        self._toolchain_file = configure_preset.get("toolchainFile")
         self._cache_variables = configure_preset["cacheVariables"]
 
         self._cmake_program = "cmake"  # Path to CMake should be handled by environment