diff --git a/src/gl/scene/gl_weapon.cpp b/src/gl/scene/gl_weapon.cpp
index 23610fb01..78c32cc07 100644
--- a/src/gl/scene/gl_weapon.cpp
+++ b/src/gl/scene/gl_weapon.cpp
@@ -98,7 +98,7 @@ void GLSceneDrawer::DrawPSprite (player_t * player,DPSprite *psp, float sx, floa
 	// calculate edges of the shape
 	scalex = (320.0f / (240.0f * r_viewwindow.WidescreenRatio)) * vw / 320;
 
-	tx = sx - (160 - r.left);
+	tx = (psp->Flags & PSPF_MIRROR) ? ((160 - r.width) - (sx + r.left)) : (sx - (160 - r.left));
 	x1 = tx * scalex + vw/2;
 	if (x1 > vw)	return; // off the right side
 	x1 += viewwindowx;
@@ -108,7 +108,6 @@ void GLSceneDrawer::DrawPSprite (player_t * player,DPSprite *psp, float sx, floa
 	if (x2 < 0) return; // off the left side
 	x2 += viewwindowx;
 
-
 	// killough 12/98: fix psprite positioning problem
 	ftexturemid = 100.f - sy - r.top;
 
@@ -130,7 +129,8 @@ void GLSceneDrawer::DrawPSprite (player_t * player,DPSprite *psp, float sx, floa
 	y1 = viewwindowy + vh / 2 - (ftexturemid * scale);
 	y2 = y1 + (r.height * scale) + 1;
 
-	if (!(mirror) != !(psp->Flags & PSPF_FLIP))
+
+	if (!(mirror) != !(psp->Flags & (PSPF_FLIP)))
 	{
 		fU2 = tex->GetSpriteUL();
 		fV1 = tex->GetSpriteVT();
@@ -437,7 +437,7 @@ void GLSceneDrawer::DrawPlayerSprites(sector_t * viewsector, bool hudModelStep)
 
 			if (psp->Flags & PSPF_ADDBOB)
 			{
-				sx += bobx;
+				sx += (psp->Flags & PSPF_MIRROR) ? -bobx : bobx;
 				sy += boby;
 			}
 
diff --git a/src/p_pspr.cpp b/src/p_pspr.cpp
index 2404b8b9c..45e92a8d0 100644
--- a/src/p_pspr.cpp
+++ b/src/p_pspr.cpp
@@ -141,6 +141,7 @@ DEFINE_FIELD_BIT(DPSprite, Flags, bAddBob, PSPF_ADDBOB)
 DEFINE_FIELD_BIT(DPSprite, Flags, bPowDouble, PSPF_POWDOUBLE)
 DEFINE_FIELD_BIT(DPSprite, Flags, bCVarFast, PSPF_CVARFAST)
 DEFINE_FIELD_BIT(DPSprite, Flags, bFlip, PSPF_FLIP)
+DEFINE_FIELD_BIT(DPSprite, Flags, bMirror, PSPF_MIRROR)
 
 //------------------------------------------------------------------------
 //
diff --git a/src/p_pspr.h b/src/p_pspr.h
index 5964ace20..c98918ded 100644
--- a/src/p_pspr.h
+++ b/src/p_pspr.h
@@ -68,6 +68,7 @@ enum PSPFlags
 	PSPF_FLIP			= 1 << 6,
 	PSPF_FORCEALPHA		= 1 << 7,
 	PSPF_FORCESTYLE		= 1 << 8,
+	PSPF_MIRROR			= 1 << 9,
 };
 
 class DPSprite : public DObject
diff --git a/wadsrc/static/zscript/constants.txt b/wadsrc/static/zscript/constants.txt
index b698f966f..b0bf1b65d 100644
--- a/wadsrc/static/zscript/constants.txt
+++ b/wadsrc/static/zscript/constants.txt
@@ -726,6 +726,7 @@ enum EPSpriteFlags
 	PSPF_FLIP		= 1 << 6,
 	PSPF_FORCEALPHA	= 1 << 7,
 	PSPF_FORCESTYLE	= 1 << 8,
+	PSPF_MIRROR		= 1 << 9,
 };
 
 // Default psprite layers