diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index ef472536966..9cdcd6b0957 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -2193,6 +2193,7 @@ static const nir_shader_compiler_options nir_options = {
         .lower_to_scalar = true,
         .lower_umax = true,
         .lower_umin = true,
+        .lower_isign = true,
         .max_unroll_iterations = 32,
 };