diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index cc40a86a18d..4f172a1675e 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -466,10 +466,10 @@ for s in [16, 32, 64]:
        (('~fadd@{}'.format(s), ('fmul', a, ('fsat', ('fadd', 1.0, ('fneg', c)))), ('fmul', b, ('fsat', c))), ('flrp', a, b, ('fsat', c)), '!options->lower_flrp{}'.format(s)),
        (('~fadd@{}'.format(s), a, ('fmul', c, ('fadd', b, ('fneg', a)))), ('flrp', a, b, c), '!options->lower_flrp{}'.format(s)),
 
-       (('~fadd@{}'.format(s),    ('fmul', a, ('fadd', 1.0, ('fneg', ('b2f', 'c@1')))), ('fmul', b, ('b2f',  c))), ('bcsel', c, b, a), 'options->lower_flrp{}'.format(s)),
+       (('~fadd@{}'.format(s), ('fmul', a, ('b2f', ('inot', 'c@1'))), ('fmul', b, ('b2f',  c))), ('bcsel', c, ('fcanonicalize', b), ('fcanonicalize', a)), 'options->lower_flrp{}'.format(s)),
        (('~fadd@{}'.format(s), a, ('fmul', ('b2f', 'c@1'), ('fadd', b, ('fneg', a)))), ('bcsel', c, ('fcanonicalize', b), ('fcanonicalize', a)), 'options->lower_flrp{}'.format(s)),
 
-       (('~ffma@{}'.format(s), a, ('fadd', 1.0, ('fneg', ('b2f', 'c@1'))), ('fmul', b, ('b2f', 'c@1'))), ('bcsel', c, ('fcanonicalize', b), ('fcanonicalize', a))),
+       (('~ffma@{}'.format(s), a, ('b2f', ('inot', 'c@1')), ('fmul', b, ('b2f', 'c@1'))), ('bcsel', c, ('fcanonicalize', b), ('fcanonicalize', a))),
        (('~ffma@{}'.format(s), b, ('b2f', 'c@1'), ('ffma', ('fneg', a), ('b2f', 'c@1'), a)), ('bcsel', c, ('fcanonicalize', b), ('fcanonicalize', a))),
 
        # These two aren't flrp lowerings, but do appear in some shaders.