diff --git a/src/r_things.cpp b/src/r_things.cpp
index 3d0ce269e..b4ee5edbb 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -2071,7 +2071,7 @@ void R_DrawSprite (vissprite_t *spr)
 	// [RH] rewrote this to be based on which part of the sector is really visible
 
 	double scale = InvZtoScale * spr->idepth;
-	double hzb = DBL_MIN, hzt = DBL_MAX;
+	double hzb = -DBL_MAX, hzt = DBL_MAX;
 
 	if (spr->bIsVoxel && spr->floorclip != 0)
 	{
diff --git a/src/s_sound.cpp b/src/s_sound.cpp
index bae1fbaf6..f01d3288c 100644
--- a/src/s_sound.cpp
+++ b/src/s_sound.cpp
@@ -692,6 +692,7 @@ static void CalcPosVel(int type, const AActor *actor, const sector_t *sector,
 		else
 		{
 			listenpos.Zero();
+			pos->Zero();
 			pgroup = 0;
 		}
 
@@ -711,7 +712,6 @@ static void CalcPosVel(int type, const AActor *actor, const sector_t *sector,
 			{
 			case SOURCE_None:
 			default:
-				pos->Zero();
 				break;
 
 			case SOURCE_Actor:
diff --git a/src/scripting/zscript/zcc_compile.cpp b/src/scripting/zscript/zcc_compile.cpp
index 4647e6b26..65d08fb92 100644
--- a/src/scripting/zscript/zcc_compile.cpp
+++ b/src/scripting/zscript/zcc_compile.cpp
@@ -69,7 +69,7 @@ static FString GetStringConst(FxExpression *ex, FCompileContext &ctx)
 {
 	ex = new FxStringCast(ex);
 	ex = ex->Resolve(ctx);
-	return static_cast<FxConstant*>(ex)->GetValue().GetString();
+	return ex ? static_cast<FxConstant*>(ex)->GetValue().GetString() : FString();
 }
 
 int ZCCCompiler::IntConstFromNode(ZCC_TreeNode *node, PStruct *cls)