diff --git a/src/microsoft/spirv_to_dxil/spirv2dxil.c b/src/microsoft/spirv_to_dxil/spirv2dxil.c
index ded6bcbf406..e590034be95 100644
--- a/src/microsoft/spirv_to_dxil/spirv2dxil.c
+++ b/src/microsoft/spirv_to_dxil/spirv2dxil.c
@@ -69,17 +69,18 @@ main(int argc, char **argv)
    char *entry_point = "main";
    char *output_file = "";
    int ch;
-   bool validate = false;
+   bool validate = false, debug = false;
    
    static struct option long_options[] = {
       {"stage", required_argument, 0, 's'},
       {"entry", required_argument, 0, 'e'},
       {"output", required_argument, 0, 'o'},
       {"validate", no_argument, 0, 'v'},
+      {"debug", no_argument, 0, 'd'},
       {0, 0, 0, 0}};
 
 
-   while ((ch = getopt_long(argc, argv, "s:e:o:v", long_options, NULL)) !=
+   while ((ch = getopt_long(argc, argv, "s:e:o:vd", long_options, NULL)) !=
           -1) {
       switch(ch)
       {
@@ -99,6 +100,9 @@ main(int argc, char **argv)
       case 'v':
          validate = true;
          break;
+      case 'd':
+         debug = true;
+         break;
       default:
          fprintf(stderr, "Unrecognized option.\n");
          return 1;
@@ -136,7 +140,7 @@ main(int argc, char **argv)
    conf.zero_based_vertex_instance_id = true;
 
    struct dxil_spirv_debug_options dbg_opts = {
-      .dump_nir = false,
+      .dump_nir = debug,
    };
 
    struct dxil_spirv_object obj;