diff --git a/cmake/modules/FindLibSpectre.cmake b/cmake/modules/FindLibSpectre.cmake
index 2d4f3cc08..060a81248 100644
--- a/cmake/modules/FindLibSpectre.cmake
+++ b/cmake/modules/FindLibSpectre.cmake
@@ -19,22 +19,24 @@ if(LIBSPECTRE_INCLUDE_DIR AND LIBSPECTRE_LIBRARY)
 
 else(LIBSPECTRE_INCLUDE_DIR AND LIBSPECTRE_LIBRARY)
 
-# use pkg-config to get the directories and then use these values
-# in the FIND_PATH() and FIND_LIBRARY() calls
-INCLUDE(UsePkgConfig)
+if(NOT WIN32)
+   # use pkg-config to get the directories and then use these values
+   # in the FIND_PATH() and FIND_LIBRARY() calls
+   INCLUDE(UsePkgConfig)
 
-PKGCONFIG(libspectre _SpectreIncDir _SpectreLinkDir _SpectreLinkFlags _SpectreCflags)
+   PKGCONFIG(libspectre _SpectreIncDir _SpectreLinkDir _SpectreLinkFlags _SpectreCflags)
 
-if(_SpectreLinkFlags)
-  # find again pkg-config, to query it about libspectre version
-  FIND_PROGRAM(PKGCONFIG_EXECUTABLE NAMES pkg-config PATHS /usr/bin/ /usr/local/bin )
+   if(_SpectreLinkFlags)
+     # find again pkg-config, to query it about libspectre version
+     FIND_PROGRAM(PKGCONFIG_EXECUTABLE NAMES pkg-config PATHS /usr/bin/ /usr/local/bin )
 
-  # query pkg-config asking for a libspectre >= LIBSPECTRE_MINIMUM_VERSION
-  EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --atleast-version=${LIBSPECTRE_MINIMUM_VERSION} libspectre RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
-  if(_return_VALUE STREQUAL "0")
-    set(LIBSPECTRE_FOUND TRUE)
-  endif(_return_VALUE STREQUAL "0")
-endif(_SpectreLinkFlags)
+     # query pkg-config asking for a libspectre >= LIBSPECTRE_MINIMUM_VERSION
+     EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --atleast-version=${LIBSPECTRE_MINIMUM_VERSION} libspectre RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
+     if(_return_VALUE STREQUAL "0")
+        set(LIBSPECTRE_FOUND TRUE)
+     endif(_return_VALUE STREQUAL "0")
+   endif(_SpectreLinkFlags)
+endif(NOT WIN32)
 
 if (LIBSPECTRE_FOUND)
   set(LIBSPECTRE_LIBRARY ${_SpectreLinkFlags})