diff --git a/libavcodec/dwt.c b/libavcodec/dwt.c
index b2b1845b9a..4b9cfd4ecc 100644
--- a/libavcodec/dwt.c
+++ b/libavcodec/dwt.c
@@ -1300,29 +1300,29 @@ int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height
     switch (type) {
     case DWT_DIRAC_DD9_7:
         d->spatial_compose = spatial_compose_dd97i_dy;
-        d->vertical_compose_l0 = vertical_compose53iL0;
-        d->vertical_compose_h0 = vertical_compose_dd97iH0;
+        d->vertical_compose_l0 = (void*)vertical_compose53iL0;
+        d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
         d->horizontal_compose = horizontal_compose_dd97i;
         d->support = 7;
         break;
     case DWT_DIRAC_LEGALL5_3:
         d->spatial_compose = spatial_compose_dirac53i_dy;
-        d->vertical_compose_l0 = vertical_compose53iL0;
-        d->vertical_compose_h0 = vertical_compose_dirac53iH0;
+        d->vertical_compose_l0 = (void*)vertical_compose53iL0;
+        d->vertical_compose_h0 = (void*)vertical_compose_dirac53iH0;
         d->horizontal_compose = horizontal_compose_dirac53i;
         d->support = 3;
         break;
     case DWT_DIRAC_DD13_7:
         d->spatial_compose = spatial_compose_dd137i_dy;
-        d->vertical_compose_l0 = vertical_compose_dd137iL0;
-        d->vertical_compose_h0 = vertical_compose_dd97iH0;
+        d->vertical_compose_l0 = (void*)vertical_compose_dd137iL0;
+        d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
         d->horizontal_compose = horizontal_compose_dd137i;
         d->support = 7;
         break;
     case DWT_DIRAC_HAAR0:
     case DWT_DIRAC_HAAR1:
         d->spatial_compose = spatial_compose_haari_dy;
-        d->vertical_compose = vertical_compose_haar;
+        d->vertical_compose = (void*)vertical_compose_haar;
         if (type == DWT_DIRAC_HAAR0)
             d->horizontal_compose = horizontal_compose_haar0i;
         else
@@ -1331,16 +1331,16 @@ int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height
         break;
     case DWT_DIRAC_FIDELITY:
         d->spatial_compose = spatial_compose_fidelity;
-        d->vertical_compose_l0 = vertical_compose_fidelityiL0;
-        d->vertical_compose_h0 = vertical_compose_fidelityiH0;
+        d->vertical_compose_l0 = (void*)vertical_compose_fidelityiL0;
+        d->vertical_compose_h0 = (void*)vertical_compose_fidelityiH0;
         d->horizontal_compose = horizontal_compose_fidelityi;
         break;
     case DWT_DIRAC_DAUB9_7:
         d->spatial_compose = spatial_compose_daub97i_dy;
-        d->vertical_compose_l0 = vertical_compose_daub97iL0;
-        d->vertical_compose_h0 = vertical_compose_daub97iH0;
-        d->vertical_compose_l1 = vertical_compose_daub97iL1;
-        d->vertical_compose_h1 = vertical_compose_daub97iH1;
+        d->vertical_compose_l0 = (void*)vertical_compose_daub97iL0;
+        d->vertical_compose_h0 = (void*)vertical_compose_daub97iH0;
+        d->vertical_compose_l1 = (void*)vertical_compose_daub97iL1;
+        d->vertical_compose_h1 = (void*)vertical_compose_daub97iH1;
         d->horizontal_compose = horizontal_compose_daub97i;
         d->support = 5;
         break;