diff --git a/src/amd/llvm/ac_nir_to_llvm.c b/src/amd/llvm/ac_nir_to_llvm.c
index ece97735712..4e00f6ed952 100644
--- a/src/amd/llvm/ac_nir_to_llvm.c
+++ b/src/amd/llvm/ac_nir_to_llvm.c
@@ -857,8 +857,18 @@ static bool visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
       src[0] = ac_to_float(&ctx->ac, src[0]);
       src[1] = ac_to_float(&ctx->ac, src[1]);
       src[2] = ac_to_float(&ctx->ac, src[2]);
-      result = ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.fma.legacy", ctx->ac.f32,
-                                  src, 3, 0);
+#if LLVM_VERSION_MAJOR <= 21
+      /* Workaround for LLVM bug that crashes when using legacy fma on GFX12. */
+      if (ctx->ac.gfx_level == GFX12) {
+         LLVMValueRef mulz = ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.fmul.legacy",
+                                                ctx->ac.f32, src, 2, 0);
+         result = LLVMBuildFAdd(ctx->ac.builder, mulz, src[2], "");
+      } else
+#endif
+      {
+         result = ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.fma.legacy", ctx->ac.f32,
+                                     src, 3, 0);
+      }
       break;
    case nir_op_ldexp:
       src[0] = ac_to_float(&ctx->ac, src[0]);