diff --git a/os/common/ports/ARMv6-M-RP2/chcore.h b/os/common/ports/ARMv6-M-RP2/chcore.h
index 0971905aa..91066c507 100644
--- a/os/common/ports/ARMv6-M-RP2/chcore.h
+++ b/os/common/ports/ARMv6-M-RP2/chcore.h
@@ -267,9 +267,12 @@
     #define PORT_INFO                   "Preemption through PendSV (SMP)"
   #endif
 #else
+#if (CORTEX_ALTERNATE_SWITCH == FALSE) || defined(__DOXYGEN__)
   #define PORT_INFO                     "Preemption through NMI"
+#else
   #define PORT_INFO                     "Preemption through PendSV"
 #endif
+#endif
 /** @} */
 
 /**