diff --git a/src/compiler/nir/nir_lower_sincos.c b/src/compiler/nir/nir_lower_sincos.c
index 5870bb11e7..f43daa27b2 100644
--- a/src/compiler/nir/nir_lower_sincos.c
+++ b/src/compiler/nir/nir_lower_sincos.c
@@ -30,7 +30,7 @@
 static nir_ssa_def *
 shrink_input(nir_builder *b, nir_ssa_def *x)
 {
-   nir_ssa_def *scaled_x = nir_fmul_imm(b, x, 1.0 / 2 * M_PI);
+   nir_ssa_def *scaled_x = nir_fmul_imm(b, x, 1.0 / (2 * M_PI));

    nir_ssa_def *xfrac = nir_fsub(b, scaled_x, nir_ffloor(b, scaled_x));
    /* Map [0.5, 1] to [-0.5, 0] */