diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index 943bde09a8a..c6a476fa6b8 100644
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -794,6 +794,12 @@ nir_fadd_imm(nir_builder *build, nir_ssa_def *x, double y)
    return nir_fadd(build, x, nir_imm_floatN_t(build, y, x->bit_size));
 }
 
+static inline nir_ssa_def *
+nir_fsub_imm(nir_builder *build, double x, nir_ssa_def *y)
+{
+   return nir_fsub(build, nir_imm_floatN_t(build, x, y->bit_size), y);
+}
+
 static inline nir_ssa_def *
 nir_fmul_imm(nir_builder *build, nir_ssa_def *x, double y)
 {