diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 1f09dc94f..bca0a7052 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -2040,6 +2040,18 @@ DEFINE_ACTION_FUNCTION(AActor, A_Stop)
 	}
 }
 
+static void CheckStopped(AActor *self)
+{
+	if (self->player != NULL &&
+		self->player->mo == self &&
+		!(self->player->cheats & CF_PREDICTING) &&
+		!(self->velx | self->vely | self->velz))
+	{
+		self->player->mo->PlayIdle();
+		self->player->velx = self->player->vely = 0;
+	}
+}
+
 //===========================================================================
 //
 // A_Respawn
@@ -2610,14 +2622,9 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ScaleVelocity)
 
 	// If the actor was previously moving but now is not, and is a player,
 	// update its player variables. (See A_Stop.)
-	if (was_moving &&
-		self->player != NULL &&
-		self->player->mo == self &&
-		!(self->player->cheats & CF_PREDICTING) &&
-		!(self->velx | self->vely | self->velz))
+	if (was_moving)
 	{
-		self->player->mo->PlayIdle();
-		self->player->velx = self->player->vely = 0;
+		CheckStopped(self);
 	}
 }
 
@@ -2635,6 +2642,8 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ChangeVelocity)
 	ACTION_PARAM_FIXED(z, 2);
 	ACTION_PARAM_INT(flags, 3);
 
+	INTBOOL was_moving = self->velx | self->vely | self->velz;
+
 	fixed_t vx = x, vy = y, vz = z;
 	fixed_t sina = finesine[self->angle >> ANGLETOFINESHIFT];
 	fixed_t cosa = finecosine[self->angle >> ANGLETOFINESHIFT];
@@ -2656,4 +2665,9 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ChangeVelocity)
 		self->vely += vy;
 		self->velz += vz;
 	}
+
+	if (was_moving)
+	{
+		CheckStopped(self);
+	}
 }
diff --git a/src/thingdef/thingdef_data.cpp b/src/thingdef/thingdef_data.cpp
index 76fc4d78c..18231e5cb 100644
--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@@ -297,7 +297,7 @@ static FFlagDef PlayerPawnFlags[] =
 	DEFINE_FLAG(PPF, NOTHRUSTWHENINVUL, APlayerPawn, PlayerFlags),
 };
 
-static const struct { const PClass *Type; FFlagDef *Defs; int NumDefs; } FlagLists[] =
+static const struct FFlagList { const PClass *Type; FFlagDef *Defs; int NumDefs; } FlagLists[] =
 {
 	{ RUNTIME_CLASS(AActor), 		ActorFlags,		countof(ActorFlags) },
 	{ RUNTIME_CLASS(AInventory), 	InventoryFlags,	countof(InventoryFlags) },
@@ -344,7 +344,7 @@ static FFlagDef *FindFlag (FFlagDef *flags, int numflags, const char *flag)
 FFlagDef *FindFlag (const PClass *type, const char *part1, const char *part2)
 {
 	FFlagDef *def;
-	int i;
+	size_t i;
 
 	if (part2 == NULL)
 	{ // Search all lists
@@ -534,7 +534,7 @@ static int STACK_ARGS varcmp(const void * a, const void * b)
 void InitThingdef()
 {
 	// Sort the flag lists
-	for (int i = 0; i < NUM_FLAG_LISTS; ++i)
+	for (size_t i = 0; i < NUM_FLAG_LISTS; ++i)
 	{
 		qsort (FlagLists[i].Defs, FlagLists[i].NumDefs, sizeof(FFlagDef), flagcmp);
 	}