diff --git a/CMLibBreathe.cmake b/CMLibBreathe.cmake
index 85f07b2..b082331 100644
--- a/CMLibBreathe.cmake
+++ b/CMLibBreathe.cmake
@@ -10,7 +10,7 @@ if (PYTHONINTERP_FOUND)
   include(FindPythonModule)
   find_python_module(breathe)
   find_python_module(recommonmark)
-  if(DOXYGEN_FOUND AND PERL_FOUND AND PYTHONINTERP_FOUND AND SPHINX_FOUND AND breathe_FOUND AND recommonmark_FOUND)
+  if(DOXYGEN_FOUND AND PERL_FOUND AND PYTHONINTERP_FOUND AND SPHINX_EXECUTABLE AND breathe AND recommonmark)
     set(BREATHE_FOUND ON CACHE STRING "Breathe documentation generator enabled" FORCE)
   else()
     set(BREATHE_FOUND OFF CACHE STRING "Breathe documentation generator disabled" FORCE)