diff --git a/src/compat.h b/src/compat.h
index 52c7817130..3f0a8b6158 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -59,4 +59,15 @@ typedef u_int SOCKET;
 #define SOCKET_ERROR        -1
 #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
+
 #endif // _BITCOIN_COMPAT_H
diff --git a/src/util.cpp b/src/util.cpp
index ae2145a3a0..606f5a60f9 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1286,3 +1286,16 @@ std::string FormatParagraph(const std::string in, size_t width, size_t indent)
     }
     return out.str();
 }
+
+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
+}
diff --git a/src/util.h b/src/util.h
index 785d4056e7..939e59c301 100644
--- a/src/util.h
+++ b/src/util.h
@@ -342,34 +342,7 @@ bool TimingResistantEqual(const T& a, const T& b)
     return accumulator == 0;
 }
 
-#ifdef WIN32
-inline void SetThreadPriority(int nPriority)
-{
-    SetThreadPriority(GetCurrentThread(), nPriority);
-}
-#else
-
-// 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)
-
-inline void SetThreadPriority(int nPriority)
-{
-    // It's unclear if it's even possible to change thread priorities on Linux,
-    // but we really and truly need it for the generation threads.
-#ifdef PRIO_THREAD
-    setpriority(PRIO_THREAD, 0, nPriority);
-#else
-    setpriority(PRIO_PROCESS, 0, nPriority);
-#endif
-}
-#endif
-
+void SetThreadPriority(int nPriority);
 void RenameThread(const char* name);
 
 // Standard wrapper for do-something-forever thread functions.