diff --git a/services/spd/tspd/tspd_main.c b/services/spd/tspd/tspd_main.c
index 3ec98d6..d2acda8 100644
--- a/services/spd/tspd/tspd_main.c
+++ b/services/spd/tspd/tspd_main.c
@@ -592,6 +592,7 @@
 
 			SMC_RET3(ns_cpu_context, x1, x2, x3);
 		}
+		assert(0); /* Unreachable */
 
 	/*
 	 * Request from the non-secure world to abort a preempted Yielding SMC