diff --git a/include/FreeRTOS.h b/include/FreeRTOS.h
index ca5818e..1a6468b 100644
--- a/include/FreeRTOS.h
+++ b/include/FreeRTOS.h
@@ -1165,6 +1165,10 @@
     #error configUSE_TASK_PREEMPTION_DISABLE is not supported in single core FreeRTOS
 #endif
 
+#if ( ( configNUMBER_OF_CORES > 1 ) && ( configUSE_PORT_OPTIMISED_TASK_SELECTION != 0 ) )
+    #error configUSE_PORT_OPTIMISED_TASK_SELECTION is not supported in SMP FreeRTOS
+#endif
+
 #ifndef configINITIAL_TICK_COUNT
     #define configINITIAL_TICK_COUNT    0
 #endif
diff --git a/tasks.c b/tasks.c
index 6cb233e..a0651b1 100644
--- a/tasks.c
+++ b/tasks.c
@@ -152,6 +152,10 @@
         listGET_OWNER_OF_NEXT_ENTRY( pxCurrentTCB, &( pxReadyTasksLists[ uxTopPriority ] ) ); \
         uxTopReadyPriority = uxTopPriority;                                                   \
     } while( 0 ) /* taskSELECT_HIGHEST_PRIORITY_TASK */
+    #else /* if ( configNUMBER_OF_CORES == 1 ) */
+
+        #define taskSELECT_HIGHEST_PRIORITY_TASK( xCoreID )    prvSelectHighestPriorityTask( xCoreID )
+
     #endif /* if ( configNUMBER_OF_CORES == 1 ) */
 
 /*-----------------------------------------------------------*/
@@ -164,10 +168,6 @@
 
 #else /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
 
-    #if ( configNUMBER_OF_CORES > 1 )
-        #error configUSE_PORT_OPTIMISED_TASK_SELECTION not supported in FreeRTOS SMP.
-    #endif
-
 /* If configUSE_PORT_OPTIMISED_TASK_SELECTION is 1 then task selection is
  * performed in a way that is tailored to the particular microcontroller
  * architecture being used. */
@@ -4701,7 +4701,7 @@
                 #endif
 
                 /* Select a new task to run. */
-                prvSelectHighestPriorityTask( xCoreID );
+                taskSELECT_HIGHEST_PRIORITY_TASK( xCoreID );
                 traceTASK_SWITCHED_IN();
 
                 /* After the new task is switched in, update the global errno. */