diff --git a/CMakeLists.txt b/CMakeLists.txt
index 979ae25..4eb88a1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -210,7 +210,9 @@ if(WIN32 AND MSVC)
     set( MSVC_FLAGS "-DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS" )
 
     # to distinguish between debug and release lib in windows
+    if("${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
     set( CMAKE_DEBUG_POSTFIX "d" ) # little effect in unix
+    endif()
 else()
     # add any gcc flags
 endif()
diff --git a/tidy.pc.cmake.in b/tidy.pc.cmake.in
index 7d819f1..cbdd299 100644
--- a/tidy.pc.cmake.in
+++ b/tidy.pc.cmake.in
@@ -7,5 +7,5 @@ Name: @LIB_NAME@
 Description: @LIBTIDY_DESCRIPTION@
 URL: @LIBTIDY_URL@
 Version: @LIBTIDY_VERSION@
-Libs: -L${libdir} -l@LIB_NAME@
+Libs: -L${libdir} -l@LIB_NAME@@CMAKE_DEBUG_POSTFIX@
 Cflags: -I${includedir}