diff --git a/headers/build/HaikuBuildCompatibility.h b/headers/build/HaikuBuildCompatibility.h
index 91d30a8aa6..15a83650b2 100644
--- a/headers/build/HaikuBuildCompatibility.h
+++ b/headers/build/HaikuBuildCompatibility.h
@@ -27,6 +27,9 @@ typedef unsigned long haiku_build_addr_t;
 #	define B_CURRENT_TEAM	0
 #endif
 
+#ifndef B_FIRST_REAL_TIME_PRIORITY
+#	define B_FIRST_REAL_TIME_PRIORITY B_REAL_TIME_DISPLAY_PRIORITY
+#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/add-ons/input_server/devices/easypen/EasyPenInputDevice.cpp b/src/add-ons/input_server/devices/easypen/EasyPenInputDevice.cpp
index 2f0a97c764..c99535d7a9 100644
--- a/src/add-ons/input_server/devices/easypen/EasyPenInputDevice.cpp
+++ b/src/add-ons/input_server/devices/easypen/EasyPenInputDevice.cpp
@@ -57,9 +57,6 @@ FILE *EasyPenInputDevice::sLogFile = NULL;
 
 #define CALLED() LOG("%s\n", __PRETTY_FUNCTION__)
 
-#ifndef B_FIRST_REAL_TIME_PRIORITY
-#	define B_FIRST_REAL_TIME_PRIORITY B_REAL_TIME_DISPLAY_PRIORITY
-#endif
 const static uint32 kTabletThreadPriority = B_FIRST_REAL_TIME_PRIORITY + 4;
 
 struct tablet_device {
diff --git a/src/add-ons/input_server/devices/mouse/MouseInputDevice.cpp b/src/add-ons/input_server/devices/mouse/MouseInputDevice.cpp
index eb3496fbb9..ca442238b8 100644
--- a/src/add-ons/input_server/devices/mouse/MouseInputDevice.cpp
+++ b/src/add-ons/input_server/devices/mouse/MouseInputDevice.cpp
@@ -35,10 +35,6 @@ FILE *MouseInputDevice::sLogFile = NULL;
 
 #define CALLED() LOG("%s\n", __PRETTY_FUNCTION__)
 
-#ifndef B_FIRST_REAL_TIME_PRIORITY
-#	define B_FIRST_REAL_TIME_PRIORITY B_REAL_TIME_DISPLAY_PRIORITY
-#endif
-
 const static uint32 kMouseThreadPriority = B_FIRST_REAL_TIME_PRIORITY + 4;
 const static char *kMouseDevicesDirectory = "/dev/input/mouse";