diff --git a/src/init.cpp b/src/init.cpp
index 7dba1a2d2..4d57d1268 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -158,7 +158,7 @@ static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
 // shutdown thing.
 //
 
-volatile bool fRequestShutdown = false;
+volatile sig_atomic_t fRequestShutdown = false;
 
 void StartShutdown()
 {
diff --git a/src/util.cpp b/src/util.cpp
index 3c15151f6..d25f3b866 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -131,7 +131,7 @@ bool fLogTimestamps = DEFAULT_LOGTIMESTAMPS;
 bool fLogTimeMicros = DEFAULT_LOGTIMEMICROS;
 bool fLogThreadNames = DEFAULT_LOGTHREADNAMES;
 bool fLogIPs = DEFAULT_LOGIPS;
-volatile bool fReopenDebugLog = false;
+volatile sig_atomic_t fReopenDebugLog = false;
 CTranslationInterface translationInterface;
 
 /** Init OpenSSL library multithreading support */
diff --git a/src/util.h b/src/util.h
index 6d582f8d1..6e391aa11 100644
--- a/src/util.h
+++ b/src/util.h
@@ -30,6 +30,10 @@
 #include <boost/signals2/signal.hpp>
 #include <boost/thread/exceptions.hpp>
 
+#ifndef WIN32
+#include <signal.h>
+#endif
+
 // Debugging macros
 
 // Uncomment the following line to enable debugging messages
@@ -71,7 +75,7 @@ extern bool fLogTimestamps;
 extern bool fLogTimeMicros;
 extern bool fLogThreadNames;
 extern bool fLogIPs;
-extern volatile bool fReopenDebugLog;
+extern volatile sig_atomic_t fReopenDebugLog;
 extern CTranslationInterface translationInterface;
 
 extern const char * const BITCOIN_CONF_FILENAME;