diff --git a/Source/objects.cpp b/Source/objects.cpp
index e7946e0f6..94b6166f8 100644
--- a/Source/objects.cpp
+++ b/Source/objects.cpp
@@ -122,7 +122,11 @@ void FreeObjectGFX()
 	numobjfiles = 0;
 }
 
+#ifdef HELLFIRE
+BOOLEAN RndLocOk(int xp, int yp)
+#else
 BOOL RndLocOk(int xp, int yp)
+#endif
 {
 	if (dMonster[xp][yp])
 		return FALSE;
diff --git a/Source/objects.h b/Source/objects.h
index 9c2c10f2b..a5bf5005c 100644
--- a/Source/objects.h
+++ b/Source/objects.h
@@ -16,7 +16,11 @@ extern int numobjfiles;
 
 void InitObjectGFX();
 void FreeObjectGFX();
+#ifdef HELLFIRE
+BOOLEAN RndLocOk(int xp, int yp);
+#else
 BOOL RndLocOk(int xp, int yp);
+#endif
 void InitRndLocObj(int min, int max, int objtype);
 void InitRndLocBigObj(int min, int max, int objtype);
 void InitRndLocObj5x5(int min, int max, int objtype);