diff --git a/cmake/FindZSTD.cmake b/cmake/FindZSTD.cmake
index 5a31dad..d9af1a1 100755
--- a/cmake/FindZSTD.cmake
+++ b/cmake/FindZSTD.cmake
@@ -28,9 +28,11 @@
 
 set(zstd_incl_dirs "/usr/include" "/usr/local/include")
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+    set(_ZSTD_x86 "(x86)")
     set(zstd_incl_dirs ${zstd_incl_dirs} "$ENV{PROGRAMFILES}/zstd/include")
-    set(zstd_incl_dirs ${zstd_incl_dirs} "$ENV{PROGRAMFILES(x86)}/zstd/include")
+    set(zstd_incl_dirs ${zstd_incl_dirs} "$ENV{PROGRAMFILES${_ZSTD_x86}}/zstd/include")
     set(zstd_incl_dirs ${zstd_incl_dirs} "$ENV{PROGRAMDATA}/chocolatey/lib/zstandard/tools/include")
+    unset(_ZSTD_x86)
 endif()
 
 if(ZSTD_INCLUDEDIR)
@@ -45,9 +47,11 @@ find_path(
 
 set(zstd_lib_dirs "/usr/lib" "/usr/local/lib")
 if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+    set(_ZSTD_x86 "(x86)")
     set(zstd_lib_dirs ${zstd_lib_dirs} "$ENV{PROGRAMFILES}/zstd/lib")
-    set(zstd_lib_dirs ${zstd_lib_dirs} "$ENV{PROGRAMFILES(x86)}/zstd/lib")
+    set(zstd_lib_dirs ${zstd_lib_dirs} "$ENV{PROGRAMFILES${_ZSTD_x86}}/zstd/lib")
     set(zstd_lib_dirs ${zstd_lib_dirs} "$ENV{PROGRAMDATA}/chocolatey/lib/zstandard/tools/dll")
+    unset(_ZSTD_x86)
 endif()
 
 if(ZSTD_LIBRARYDIR)