diff --git a/config/cmake/scripts/HDF5config.cmake b/config/cmake/scripts/HDF5config.cmake
index 2874a74ef0..2b1b0970b0 100755
--- a/config/cmake/scripts/HDF5config.cmake
+++ b/config/cmake/scripts/HDF5config.cmake
@@ -82,7 +82,7 @@ set(CTEST_CONFIGURATION_TYPE "$ENV{CMAKE_CONFIG_TYPE}")
 
 if(NOT DEFINED INSTALLDIR)
   if(WIN32)
-    set(INSTALLDIR "C:\\Program\ Files\\HDF_Group\\HDF5\\${CTEST_SOURCE_VERSION}")
+    set(INSTALLDIR "C:/Program Files/HDF_Group/HDF5/${CTEST_SOURCE_VERSION}")
   else()
     set(INSTALLDIR "${CTEST_SCRIPT_DIRECTORY}/HDF_Group/HDF5/${CTEST_SOURCE_VERSION}")
   endif()
@@ -232,7 +232,7 @@ endif()
 set(ADD_BUILD_OPTIONS "${ADD_BUILD_OPTIONS} -DHDF5_PACKAGE_EXTLIBS:BOOL=ON")
 
 ### change install prefix
-set(BUILD_OPTIONS "${BUILD_OPTIONS} -DCMAKE_INSTALL_PREFIX:PATH='${INSTALLDIR}'")
+set(BUILD_OPTIONS "${BUILD_OPTIONS} -DCMAKE_INSTALL_PREFIX:PATH=${INSTALLDIR}")
 set(BUILD_OPTIONS "${BUILD_OPTIONS} -DCTEST_CONFIGURATION_TYPE:STRING=$ENV{CMAKE_CONFIG_TYPE}")
 
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