diff --git a/rehlds/engine/model.cpp b/rehlds/engine/model.cpp
index 4c29ecc..a4581e5 100644
--- a/rehlds/engine/model.cpp
+++ b/rehlds/engine/model.cpp
@@ -866,10 +866,12 @@ void CalcSurfaceExtents(msurface_t *s)
 
 		for (j = 0; j < 2; j++)
 		{
-			val = v->position[0] * tex->vecs[j][0] +
-				v->position[1] * tex->vecs[j][1] +
-				v->position[2] * tex->vecs[j][2] +
-				tex->vecs[j][3];
+			// FIXED: loss of floating point
+			val = v->position[0] * (double)tex->vecs[j][0] +
+				v->position[1] * (double)tex->vecs[j][1] +
+				v->position[2] * (double)tex->vecs[j][2] +
+				(double)tex->vecs[j][3];
+
 			if (val < mins[j])
 				mins[j] = val;
 			if (val > maxs[j])