diff --git a/source/core/gamefuncs.h b/source/core/gamefuncs.h
index c02139ba6..a12050e03 100644
--- a/source/core/gamefuncs.h
+++ b/source/core/gamefuncs.h
@@ -132,9 +132,8 @@ inline void copyfloorpal(spritetype* spr, const sectortype* sect)
     if (!lookups.noFloorPal(sect->floorpal)) spr->pal = sect->floorpal;
 }
 
-inline void spriteSetSlope(int spritenum, int heinum)
+inline void spriteSetSlope(spritetype* spr, int heinum)
 {
-    auto spr = &sprite[spritenum];
     int cstat = spr->cstat & CSTAT_SPRITE_ALIGNMENT_MASK;
     if (spr->cstat & CSTAT_SPRITE_ALIGNMENT_FLOOR)
     {
@@ -144,9 +143,8 @@ inline void spriteSetSlope(int spritenum, int heinum)
     }
 }
 
-inline int spriteGetSlope(int spritenum)
+inline int spriteGetSlope(spritetype* spr)
 {
-    auto spr = &sprite[spritenum];
     return ((spr->cstat & CSTAT_SPRITE_ALIGNMENT_MASK) != CSTAT_SPRITE_ALIGNMENT_SLOPE) ? 0 : uint8_t(spr->xoffset) + (uint8_t(spr->yoffset) << 8);
 }
 
diff --git a/source/games/blood/src/nnexts.cpp b/source/games/blood/src/nnexts.cpp
index 3f4a3274d..3f90a5a41 100644
--- a/source/games/blood/src/nnexts.cpp
+++ b/source/games/blood/src/nnexts.cpp
@@ -4399,7 +4399,7 @@ bool condCheckSprite(XSPRITE* pXCond, int cmpOp, bool PUSH) {
             case 0: return condCmp((pSpr->ang & 2047), arg1, arg2, cmpOp);
             case 5: return condCmp(pSpr->statnum, arg1, arg2, cmpOp);
             case 6: return ((pSpr->flags & kHitagRespawn) || pSpr->statnum == kStatRespawn);
-            case 7: return condCmp(spriteGetSlope(pSpr->index), arg1, arg2, cmpOp);
+        case 7: return condCmp(spriteGetSlope(pSpr), arg1, arg2, cmpOp);
             case 10: return condCmp(pSpr->clipdist, arg1, arg2, cmpOp);
             case 15:
                 if (!spriRangeIsFine(pSpr->owner)) return false;
@@ -6474,7 +6474,7 @@ void sprite2sectorSlope(spritetype* pSprite, sectortype* pSector, char rel, bool
             break;
     }
 
-    spriteSetSlope(pSprite->index, slope);
+    spriteSetSlope(pSprite, slope);
     if (forcez) pSprite->z = z;
 }
 
@@ -6613,7 +6613,7 @@ void useSlopeChanger(XSPRITE* pXSource, int objType, int objIndex) {
                 }
                 break;
             default:
-        spriteSetSlope(objIndex, slope);
+                spriteSetSlope(pSpr, slope);
                 break;
     }
     }