diff --git a/src/amd/common/ac_nir_lower_ngg.c b/src/amd/common/ac_nir_lower_ngg.c
index e7e2a660f40..e4cb010b9e6 100644
--- a/src/amd/common/ac_nir_lower_ngg.c
+++ b/src/amd/common/ac_nir_lower_ngg.c
@@ -1103,6 +1103,8 @@ analyze_shader_before_culling_walk(nir_ssa_def *ssa,
 static void
 analyze_shader_before_culling(nir_shader *shader, lower_ngg_nogs_state *s)
 {
+   /* LCSSA is needed to get correct results from divergence analysis. */
+   nir_convert_to_lcssa(shader, true, true);
    /* We need divergence info for culling shaders. */
    nir_divergence_analysis(shader);