diff --git a/src/script/serverchecker.cpp b/src/script/serverchecker.cpp
index 52cfcc57b..acff88450 100644
--- a/src/script/serverchecker.cpp
+++ b/src/script/serverchecker.cpp
@@ -12,7 +12,7 @@
 #include "uint256.h"
 #include "util.h"
 
-//#undef __cpuid
+#undef __cpuid
 #include <boost/thread.hpp>
 #include <boost/tuple/tuple_comparison.hpp>
 
diff --git a/src/support/pagelocker.h b/src/support/pagelocker.h
index 677ee347c..7385bc444 100644
--- a/src/support/pagelocker.h
+++ b/src/support/pagelocker.h
@@ -10,7 +10,7 @@
 
 #include <map>
 
-//#undef __cpuid
+#undef __cpuid
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/once.hpp>
 
diff --git a/src/sync.h b/src/sync.h
index 5fa49947b..c9ba7f8b0 100644
--- a/src/sync.h
+++ b/src/sync.h
@@ -8,7 +8,7 @@
 
 #include "threadsafety.h"
 
-//#undef __cpuid
+#undef __cpuid
 #include <boost/thread/condition_variable.hpp>
 #include <boost/thread/locks.hpp>
 #include <boost/thread/mutex.hpp>