diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index a896deab094..86917935bec 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -3011,7 +3011,8 @@ intrinsic("smp_pco", src_comp=[16, 4, 4], dest_comp=0, indices=[SMP_FLAGS_PCO, R
 
 # smp_coeffs_pco(data, tex_state, smp_state)
 # Returns the calculated sampling coefficients for the given data and state words.
-intrinsic("smp_coeffs_pco", src_comp=[16, 4, 4], dest_comp=8, indices=[SMP_FLAGS_PCO, RANGE], bit_sizes=[32])
+# Actually outputs 7/14 components, but NIR doesn't support those for num_components, so fake it as 16 for now.
+intrinsic("smp_coeffs_pco", src_comp=[16, 4, 4], dest_comp=16, indices=[SMP_FLAGS_PCO, RANGE], bit_sizes=[32])
 
 # smp_raw_pco(data, tex_state, smp_state)
 # Returns the raw sampling data for the given data and state words.
diff --git a/src/imagination/pco/pco_trans_nir.c b/src/imagination/pco/pco_trans_nir.c
index bfa853fe040..269602d1f5c 100644
--- a/src/imagination/pco/pco_trans_nir.c
+++ b/src/imagination/pco/pco_trans_nir.c
@@ -1697,8 +1697,11 @@ static pco_instr *lower_smp(trans_ctx *tctx,
    enum pco_sb_mode sb_mode = PCO_SB_MODE_NONE;
    switch (intr->intrinsic) {
    case nir_intrinsic_smp_coeffs_pco:
-      /* Shrink the destination to its actual size. */
-      *dest = pco_ref_chans(*dest, ROGUE_SMP_COEFF_COUNT);
+      /* Shrink the destination to its actual size.
+       * Trilinear filtering will produce two sets of coeffs;
+       * reserve both just in case so that we don't clobber output regs.
+       */
+      *dest = pco_ref_chans(*dest, ROGUE_SMP_COEFF_COUNT * 2u);
       chans = 1; /* Chans must be 1 for coeff mode. */
 
       sb_mode = PCO_SB_MODE_COEFFS;