diff --git a/include/light/light.h b/include/light/light.h
index 002f5f17..b7a39ad5 100644
--- a/include/light/light.h
+++ b/include/light/light.h
@@ -303,7 +303,7 @@ Face_MakeInwardFacingEdgePlanes(const bsp2_t *bsp, const bsp2_dface_t *face, pla
 /* vis testing */
 const bsp2_dleaf_t *Light_PointInLeaf( const bsp2_t *bsp, const vec3_t point );
 int Light_PointContents( const bsp2_t *bsp, const vec3_t point );
-void Mod_LeafPvs(const bsp2_t *bsp, const bsp2_dleaf_t *leaf, byte *out);
+bool Mod_LeafPvs(const bsp2_t *bsp, const bsp2_dleaf_t *leaf, byte *out);
 int DecompressedVisSize(const bsp2_t *bsp);
 bool Pvs_LeafVisible(const bsp2_t *bsp, const byte *pvs, const bsp2_dleaf_t *leaf);
     
diff --git a/light/ltface.c b/light/ltface.c
index 56454197..4fa773bd 100644
--- a/light/ltface.c
+++ b/light/ltface.c
@@ -671,7 +671,7 @@ static void Mod_Q1BSP_DecompressVis(const unsigned char *in, const unsigned char
     }
 }
 
-void
+bool
 Mod_LeafPvs(const bsp2_t *bsp, const bsp2_dleaf_t *leaf, byte *out)
 {
     const int num_pvsclusterbytes = DecompressedVisSize(bsp);
@@ -684,20 +684,21 @@ Mod_LeafPvs(const bsp2_t *bsp, const bsp2_dleaf_t *leaf, byte *out)
     const int leafnum = (leaf - bsp->dleafs);
     const int visleaf = leafnum - 1;
     if (visleaf < 0 || visleaf >= bsp->dmodels[0].visleafs)
-        return;
+        return false;
     
     if (leaf->visofs < 0)
-        return;
+        return false;
     
     if (leaf->visofs >= bsp->visdatasize) {
         logprint("Mod_LeafPvs: invalid visofs for leaf %d\n", leafnum);
-        return;
+        return false;
     }
     
     Mod_Q1BSP_DecompressVis(bsp->dvisdata + leaf->visofs,
                             bsp->dvisdata + bsp->visdatasize,
                             out,
                             out + num_pvsclusterbytes);
+    return true;
 }
 
 // returns true if pvs can see leaf