diff --git a/src/compat.h b/src/compat.h
index 5c15e3306..718e3f751 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -78,17 +78,6 @@ typedef u_int SOCKET;
 #define MSG_NOSIGNAL 0
 #endif
 
-#ifndef WIN32
-// PRIO_MAX is not defined on Solaris
-#ifndef PRIO_MAX
-#define PRIO_MAX 20
-#endif
-#define THREAD_PRIORITY_LOWEST          PRIO_MAX
-#define THREAD_PRIORITY_BELOW_NORMAL    2
-#define THREAD_PRIORITY_NORMAL          0
-#define THREAD_PRIORITY_ABOVE_NORMAL    (-2)
-#endif
-
 #if HAVE_DECL_STRNLEN == 0
 size_t strnlen( const char *start, size_t max_len);
 #endif // HAVE_DECL_STRNLEN
diff --git a/src/net.cpp b/src/net.cpp
index bac1987bf..da00b6b62 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1919,7 +1919,6 @@ bool CConnman::OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGran
 
 void CConnman::ThreadMessageHandler()
 {
-    SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
     while (!flagInterruptMsgProc)
     {
         std::vector<CNode*> vNodesCopy = CopyNodeVector();
diff --git a/src/util.cpp b/src/util.cpp
index ae10b55e6..3c15151f6 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -910,19 +910,6 @@ bool SetupNetworking()
     return true;
 }
 
-void SetThreadPriority(int nPriority)
-{
-#ifdef WIN32
-    SetThreadPriority(GetCurrentThread(), nPriority);
-#else // WIN32
-#ifdef PRIO_THREAD
-    setpriority(PRIO_THREAD, 0, nPriority);
-#else // PRIO_THREAD
-    setpriority(PRIO_PROCESS, 0, nPriority);
-#endif // PRIO_THREAD
-#endif // WIN32
-}
-
 int GetNumCores()
 {
 #if BOOST_VERSION >= 105600
diff --git a/src/util.h b/src/util.h
index 647cb2b3f..6d582f8d1 100644
--- a/src/util.h
+++ b/src/util.h
@@ -231,7 +231,6 @@ std::string HelpMessageOpt(const std::string& option, const std::string& message
  */
 int GetNumCores();
 
-void SetThreadPriority(int nPriority);
 void RenameThread(const char* name);
 std::string GetThreadName();