diff --git a/cmake/modules/FindSphinx.cmake b/cmake/modules/FindSphinx.cmake
index f111ea2..528b107 100644
--- a/cmake/modules/FindSphinx.cmake
+++ b/cmake/modules/FindSphinx.cmake
@@ -14,7 +14,9 @@ find_package_handle_standard_args (Sphinx DEFAULT_MSG
 # Get Sphinx Version
 if (SPHINX_EXECUTABLE)
     execute_process(COMMAND ${SPHINX_EXECUTABLE} --version
-                    OUTPUT_VARIABLE SPHINX_VERSION_STRING)
+                    OUTPUT_VARIABLE SPHINX_VERSION_STRING
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    ERROR_STRIP_TRAILING_WHITESPACE)
     if (SPHINX_VERSION_STRING)
         string(REPLACE "Sphinx (sphinx-build) " "" SPHINX_VERSION ${SPHINX_VERSION_STRING})
         message (STATUS "Sphinx version is ${SPHINX_VERSION}")
diff --git a/cmake/modules/FindYuidoc.cmake b/cmake/modules/FindYuidoc.cmake
index 1d175ae..63c4937 100644
--- a/cmake/modules/FindYuidoc.cmake
+++ b/cmake/modules/FindYuidoc.cmake
@@ -14,7 +14,9 @@ find_package_handle_standard_args (Yuidoc DEFAULT_MSG
 # Get Yuidoc version
 if (YUIDOC_EXECUTABLE)
   execute_process(COMMAND ${YUIDOC_EXECUTABLE} --version
-                  ERROR_VARIABLE YUIDOC_VERSION)
+                  ERROR_VARIABLE YUIDOC_VERSION
+                  OUTPUT_STRIP_TRAILING_WHITESPACE
+                  ERROR_STRIP_TRAILING_WHITESPACE)
   if (YUIDOC_VERSION)
     message (STATUS "Yuidoc version is ${YUIDOC_VERSION}")
   endif ()