diff --git a/cmake/OpenCVDetectPython.cmake b/cmake/OpenCVDetectPython.cmake
index 81b65eb934244490e2981ab2999ef5a2827973f5..54ddac15d15db74a826f50aa0aeecfac6aa38661 100644
--- a/cmake/OpenCVDetectPython.cmake
+++ b/cmake/OpenCVDetectPython.cmake
@@ -108,7 +108,7 @@ if(PYTHON_EXECUTABLE)
                         OUTPUT_QUIET
                         ERROR_VARIABLE SPHINX_OUTPUT
                         OUTPUT_STRIP_TRAILING_WHITESPACE)
-        if(SPHINX_OUTPUT MATCHES ".*Sphinx v([0-9][^ \n]*)")
+        if(SPHINX_OUTPUT MATCHES "Sphinx v([0-9][^ \n]*)")
           set(SPHINX_VERSION "${CMAKE_MATCH_1}")
           set(HAVE_SPHINX 1)
           message(STATUS "Found Sphinx ${SPHINX_VERSION}: ${SPHINX_BUILD}")