diff --git a/src/p_slopes.h b/src/p_slopes.h
index f2d1cd81e..8d82632ff 100644
--- a/src/p_slopes.h
+++ b/src/p_slopes.h
@@ -29,9 +29,6 @@
 #define P_SLOPES_H__
 
 #ifdef ESLOPE
-void P_CalculateSlopeNormal(pslope_t *slope);
-void P_ReconfigureVertexSlope(pslope_t *slope);
-
 void P_ResetDynamicSlopes(void);
 void P_RunDynamicSlopes(void);
 // P_SpawnSlope_Line
@@ -39,8 +36,6 @@ void P_RunDynamicSlopes(void);
 // sectors.
 void P_SpawnSlope_Line(int linenum);
 
-pslope_t *P_NewVertexSlope(INT16 tag1, INT16 tag2, INT16 tag3, UINT8 flags);
-
 #ifdef SPRINGCLEAN
 // Loads just map objects that make slopes,
 // terrain affecting objects have to be spawned first