diff --git a/Utilities/cmxmlrpc/CMakeLists.txt b/Utilities/cmxmlrpc/CMakeLists.txt
index 893fff62c..4aa2ca313 100644
--- a/Utilities/cmxmlrpc/CMakeLists.txt
+++ b/Utilities/cmxmlrpc/CMakeLists.txt
@@ -49,7 +49,7 @@ ENDIF(ATTR_UNUSED_VAR)
 SET(HAVE_LIBWWW_SSL)
 SET(DIRECTORY_SEPARATOR "/")
 
-SET(HAVE_PTHREADS)
+SET(HAVE_PTHREADS 0)
 IF(CMAKE_BUILD_XMLRPC_WITH_THREADS)
   FIND_PACKAGE(Threads)
   IF(WIN32 OR CMAKE_USE_PTHREADS_INIT)
diff --git a/Utilities/cmxmlrpc/win32_pthreads.c b/Utilities/cmxmlrpc/win32_pthreads.c
index a072f9b48..8f736ca58 100644
--- a/Utilities/cmxmlrpc/win32_pthreads.c
+++ b/Utilities/cmxmlrpc/win32_pthreads.c
@@ -27,6 +27,7 @@
 
 #ifdef _WIN32
 
+#define HAVE_PTHREADS 1
 #include "xmlrpc_pthreads.h"
 
 #include <process.h>