diff --git a/FreeRTOS/Test/CBMC/patches/FreeRTOSConfig.h b/FreeRTOS/Test/CBMC/patches/FreeRTOSConfig.h
index e36a82ae54..454291682f 100644
--- a/FreeRTOS/Test/CBMC/patches/FreeRTOSConfig.h
+++ b/FreeRTOS/Test/CBMC/patches/FreeRTOSConfig.h
@@ -43,7 +43,7 @@
 *----------------------------------------------------------*/
 #define configENABLE_BACKWARD_COMPATIBILITY        1
 #define configUSE_PREEMPTION                       1
-#define configUSE_PORT_OPTIMISED_TASK_SELECTION    1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION    0
 #define configMAX_PRIORITIES                       ( 7 )
 #define configTICK_RATE_HZ                         ( 1000 )                  /* In this non-real time simulated environment the tick frequency has to be at least a multiple of the Win32 tick frequency, and therefore very slow. */
 #define configMINIMAL_STACK_SIZE                   ( ( unsigned short ) 60 ) /* In this simulated case, the stack only has to hold one small structure as the real stack is part of the Win32 thread. */