diff --git a/src/p_saveg.c b/src/p_saveg.c
index 0bfb81f4e..ea998b445 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -2404,7 +2404,7 @@ static void P_NetArchiveThinkers(void)
 			}
 #endif // ESLOPE
 #ifdef PARANOIA
-			else if (th->function.acp1 != P_RemoveThinkerDelayed) // wait garbage collection
+			else if (th->function.acp1 != (actionf_p1)P_RemoveThinkerDelayed) // wait garbage collection
 				I_Error("unknown thinker type %p", th->function.acp1);
 #endif
 		}
diff --git a/src/p_tick.c b/src/p_tick.c
index 5ec0fb048..7606510fe 100644
--- a/src/p_tick.c
+++ b/src/p_tick.c
@@ -197,7 +197,7 @@ void P_InitThinkers(void)
 void P_AddThinker(const thinklistnum_t n, thinker_t *thinker)
 {
 #ifdef PARANOIA
-	I_Assert(n >= 0 && n < NUM_THINKERLISTS);
+	I_Assert(n < NUM_THINKERLISTS);
 #endif
 
 	thlist[n].prev->next = thinker;
@@ -326,7 +326,7 @@ static inline void P_RunThinkers(void)
 		for (currentthinker = thlist[i].next; currentthinker != &thlist[i]; currentthinker = currentthinker->next)
 		{
 #ifdef PARANOIA
-			I_Assert(currentthinker->function.acp1 != NULL)
+			I_Assert(currentthinker->function.acp1 != NULL);
 #endif
 			currentthinker->function.acp1(currentthinker);
 		}