diff --git a/src/g_shared/a_decals.cpp b/src/g_shared/a_decals.cpp
index 3840a9af9..edc170294 100644
--- a/src/g_shared/a_decals.cpp
+++ b/src/g_shared/a_decals.cpp
@@ -704,7 +704,7 @@ CCMD (spray)
 	Net_WriteString (argv[1]);
 }
 
-void SprayDecal(AActor *shooter, const char *name)
+void SprayDecal(AActor *shooter, const char *name, double distance)
 {
 	FTraceResults trace;
 
@@ -713,7 +713,7 @@ void SprayDecal(AActor *shooter, const char *name)
 	double c = pitch.Cos();
 	DVector3 vec(c * ang.Cos(), c * ang.Sin(), -pitch.Sin());
 
-	if (Trace(shooter->PosPlusZ(shooter->Height / 2), shooter->Sector, vec, 172., 0, ML_BLOCKEVERYTHING, shooter, trace, TRACE_NoSky))
+	if (Trace(shooter->PosPlusZ(shooter->Height / 2), shooter->Sector, vec, distance, 0, ML_BLOCKEVERYTHING, shooter, trace, TRACE_NoSky))
 	{
 		if (trace.HitType == TRACE_HitWall)
 		{
diff --git a/src/g_shared/a_sharedglobal.h b/src/g_shared/a_sharedglobal.h
index f45cd9d0e..626985f93 100644
--- a/src/g_shared/a_sharedglobal.h
+++ b/src/g_shared/a_sharedglobal.h
@@ -11,7 +11,7 @@ struct F3DFloor;
 class DBaseDecal;
 
 class DBaseDecal *ShootDecal(const FDecalTemplate *tpl, AActor *basisactor, sector_t *sec, double x, double y, double z, DAngle angle, double tracedist, bool permanent);
-void SprayDecal(AActor *shooter, const char *name);
+void SprayDecal(AActor *shooter, const char *name,double distance = 172.);
 
 class DBaseDecal : public DThinker
 {
diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index 0387bfd52..838c885e6 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -6813,7 +6813,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_SprayDecal)
 {
 	PARAM_SELF_PROLOGUE(AActor);
 	PARAM_STRING(name);
-	SprayDecal(self, name);
+	PARAM_FLOAT_DEF(dist);
+	SprayDecal(self, name, dist);
 	return 0;
 }
 
diff --git a/wadsrc/static/zscript/actor.txt b/wadsrc/static/zscript/actor.txt
index fb883f846..9b7836d17 100644
--- a/wadsrc/static/zscript/actor.txt
+++ b/wadsrc/static/zscript/actor.txt
@@ -1092,7 +1092,7 @@ class Actor : Thinker native
 	native bool A_SetVisibleRotation(double anglestart = 0, double angleend = 0, double pitchstart = 0, double pitchend = 0, int flags = 0, int ptr = AAPTR_DEFAULT);
 	native void A_SetTranslation(name transname);
 	native bool A_SetSize(double newradius, double newheight = -1, bool testpos = false);
-	native void A_SprayDecal(String name);
+	native void A_SprayDecal(String name, double dist = 172);
 	native void A_SetMugshotState(String name);
 
 	native void A_RearrangePointers(int newtarget, int newmaster = AAPTR_DEFAULT, int newtracer = AAPTR_DEFAULT, int flags=0);