diff --git a/src/p_glnodes.cpp b/src/p_glnodes.cpp
index e4993a2733..480e76a532 100644
--- a/src/p_glnodes.cpp
+++ b/src/p_glnodes.cpp
@@ -1333,7 +1333,7 @@ CCMD(clearnodecache)
 //
 //==========================================================================
 
-subsector_t *P_PointInSubsector (fixed_t x, fixed_t y)
+subsector_t *P_PointInSubsector (double x, double y)
 {
 	node_t *node;
 	int side;
diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index 088266656a..a7ec7c042f 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -1791,12 +1791,14 @@ static AActor *RoughBlockCheck (AActor *mo, int index, void *param)
 //
 //==========================================================================
 
-static int R_PointOnSideSlow(double x, double y, node_t *node)
+static int R_PointOnSideSlow(double xx, double yy, node_t *node)
 {
 	// [RH] This might have been faster than two multiplies and an
 	// add on a 386/486, but it certainly isn't on anything newer than that.
 	fixed_t	dx;
 	fixed_t	dy;
+	fixed_t x = FloatToFixed(xx);
+	fixed_t y = FloatToFixed(yy);
 	double	left;
 	double	right;
 
@@ -1815,8 +1817,8 @@ static int R_PointOnSideSlow(double x, double y, node_t *node)
 		return node->dx > 0;
 	}
 
-	dx = (FloatToFixed(x) - node->x);
-	dy = (FloatToFixed(y) - node->y);
+	dx = (x - node->x);
+	dy = (y - node->y);
 
 	// Try to quickly decide by looking at sign bits.
 	if ((node->dy ^ node->dx ^ dx ^ dy) & 0x80000000)
diff --git a/src/r_defs.h b/src/r_defs.h
index 984a726b40..3df88f1950 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -1574,20 +1574,17 @@ struct visstyle_t
 // not the same as R_PointInSubsector
 //
 //----------------------------------------------------------------------------------
-subsector_t *P_PointInSubsector(fixed_t x, fixed_t y);
-inline sector_t *P_PointInSector(fixed_t x, fixed_t y)
-{
-	return P_PointInSubsector(x, y)->sector;
-}
+subsector_t *P_PointInSubsector(double x, double y);
+sector_t *P_PointInSector(fixed_t x, fixed_t y) = delete;
 
 inline sector_t *P_PointInSector(const DVector2 &pos)
 {
-	return P_PointInSubsector(FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y))->sector;
+	return P_PointInSubsector(pos.X, pos.Y)->sector;
 }
 
 inline sector_t *P_PointInSector(double X, double Y)
 {
-	return P_PointInSubsector(FLOAT2FIXED(X), FLOAT2FIXED(Y))->sector;
+	return P_PointInSubsector(X, Y)->sector;
 }
 
 inline DVector3 AActor::PosRelative(int portalgroup) const
diff --git a/src/r_utility.h b/src/r_utility.h
index 7df9c3606d..f37fc01ee3 100644
--- a/src/r_utility.h
+++ b/src/r_utility.h
@@ -55,6 +55,10 @@ inline int R_PointOnSide (fixed_t x, fixed_t y, const node_t *node)
 {
 	return DMulScale32 (y-node->y, node->dx, node->x-x, node->dy) > 0;
 }
+inline int R_PointOnSide(double x, double y, const node_t *node)
+{
+	return DMulScale32(FLOAT2FIXED(y) - node->y, node->dx, node->x - FLOAT2FIXED(x), node->dy) > 0;
+}
 inline int R_PointOnSide(const DVector2 &pos, const node_t *node)
 {
 	return DMulScale32(FLOAT2FIXED(pos.Y) - node->y, node->dx, node->x - FLOAT2FIXED(pos.X), node->dy) > 0;
diff --git a/src/s_sound.cpp b/src/s_sound.cpp
index 51f4d8adb1..f884b4be7b 100644
--- a/src/s_sound.cpp
+++ b/src/s_sound.cpp
@@ -763,7 +763,7 @@ static void CalcSectorSoundOrg(const sector_t *sec, int channum, fixed_t *x, fix
 	if (!(i_compatflags & COMPATF_SECTORSOUNDS))
 	{
 		// Are we inside the sector? If yes, the closest point is the one we're on.
-		if (P_PointInSector(*x, *y) == sec)
+		if (P_PointInSector(FIXED2DBL(*x), FIXED2DBL(*y)) == sec)
 		{
 			FVector3 p = players[consoleplayer].camera->SoundPos();
 			*x = FLOAT2FIXED(p.X);