diff --git a/quakespasm/Quake/gl_rlight.c b/quakespasm/Quake/gl_rlight.c
index e37c988e..86c73b87 100644
--- a/quakespasm/Quake/gl_rlight.c
+++ b/quakespasm/Quake/gl_rlight.c
@@ -267,8 +267,6 @@ mplane_t		*lightplane;
 vec3_t			lightspot;
 vec3_t			lightcolor; //johnfitz -- lit support via lordhavoc
 
-#define DoublePrecisionDotProduct(x,y) ((double)x[0]*y[0]+(double)x[1]*y[1]+(double)x[2]*y[2])
-
 /*
 =============
 RecursiveLightPoint -- johnfitz -- replaced entire function for lit support via lordhavoc
diff --git a/quakespasm/Quake/mathlib.h b/quakespasm/Quake/mathlib.h
index a9001314..a607905f 100644
--- a/quakespasm/Quake/mathlib.h
+++ b/quakespasm/Quake/mathlib.h
@@ -52,6 +52,7 @@ static inline int IS_NAN (float x) {
 #define Q_rint(x) ((x) > 0 ? (int)((x) + 0.5) : (int)((x) - 0.5)) //johnfitz -- from joequake
 
 #define DotProduct(x,y) (x[0]*y[0]+x[1]*y[1]+x[2]*y[2])
+#define DoublePrecisionDotProduct(x,y) ((double)x[0]*y[0]+(double)x[1]*y[1]+(double)x[2]*y[2])
 #define VectorSubtract(a,b,c) {c[0]=a[0]-b[0];c[1]=a[1]-b[1];c[2]=a[2]-b[2];}
 #define VectorAdd(a,b,c) {c[0]=a[0]+b[0];c[1]=a[1]+b[1];c[2]=a[2]+b[2];}
 #define VectorCopy(a,b) {b[0]=a[0];b[1]=a[1];b[2]=a[2];}
diff --git a/quakespasm/Quake/world.c b/quakespasm/Quake/world.c
index 6c0e1e5b..552f455d 100644
--- a/quakespasm/Quake/world.c
+++ b/quakespasm/Quake/world.c
@@ -495,7 +495,7 @@ int SV_HullPointContents (hull_t *hull, int num, vec3_t p)
 		if (plane->type < 3)
 			d = p[plane->type] - plane->dist;
 		else
-			d = DotProduct (plane->normal, p) - plane->dist;
+			d = DoublePrecisionDotProduct (plane->normal, p) - plane->dist;
 		if (d < 0)
 			num = node->children[1];
 		else
@@ -606,8 +606,8 @@ qboolean SV_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, vec
 	}
 	else
 	{
-		t1 = DotProduct (plane->normal, p1) - plane->dist;
-		t2 = DotProduct (plane->normal, p2) - plane->dist;
+		t1 = DoublePrecisionDotProduct (plane->normal, p1) - plane->dist;
+		t2 = DoublePrecisionDotProduct (plane->normal, p2) - plane->dist;
 	}
 
 #if 1