diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index cd12a99..03c2c4d 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -419,6 +419,8 @@ expat_install(FILES lib/expat.h lib/expat_external.h DESTINATION ${CMAKE_INSTALL
 #
 # pkg-config file
 #
+string(TOUPPER "${CMAKE_BUILD_TYPE}" BUILD_TYPE_UPPER)
+set(_EXPAT_OUTPUT_NAME ${_EXPAT_OUTPUT_NAME}${CMAKE_${BUILD_TYPE_UPPER}_POSTFIX})
 if(EXPAT_BUILD_PKGCONFIG)
     set(prefix ${CMAKE_INSTALL_PREFIX})
     set(exec_prefix "\${prefix}")