diff --git a/src/evergreen_exa.c b/src/evergreen_exa.c
index d93cb42..69b2fd9 100644
--- a/src/evergreen_exa.c
+++ b/src/evergreen_exa.c
@@ -163,6 +163,7 @@ EVERGREENPrepareSolid(PixmapPtr pPix, int alu, Pixel pm, Pixel fg)
     ps_alu_consts = radeon_vbo_space(pScrn, &accel_state->cbuf, 256);
     ps_const_conf.bo = accel_state->cbuf.vb_bo;
     ps_const_conf.const_addr = accel_state->cbuf.vb_mc_addr + accel_state->cbuf.vb_offset;
+    ps_const_conf.cpu_ptr = (void*)ps_alu_consts;
     if (accel_state->dst_obj.bpp == 16) {
 	r = (fg >> 11) & 0x1f;
 	g = (fg >> 5) & 0x3f;
@@ -1282,6 +1283,7 @@ static Bool EVERGREENPrepareComposite(int op, PicturePtr pSrcPicture,
     cbuf = radeon_vbo_space(pScrn, &accel_state->cbuf, 256);
     vs_const_conf.bo = accel_state->cbuf.vb_bo;
     vs_const_conf.const_addr = accel_state->cbuf.vb_mc_addr + accel_state->cbuf.vb_offset;
+    vs_const_conf.cpu_ptr = (void*)cbuf;
 
     EVERGREENXFormSetup(pSrcPicture, pSrc, 0, cbuf);
     if (pMask)
diff --git a/src/evergreen_state.h b/src/evergreen_state.h
index 480c141..204f188 100644
--- a/src/evergreen_state.h
+++ b/src/evergreen_state.h
@@ -120,6 +120,7 @@ typedef struct {
     int size_bytes;
     uint64_t const_addr;
     struct radeon_bo *bo;
+    uint32_t *cpu_ptr;
 } const_config_t;
 
 /* Vertex buffer / vtx resource */