diff --git a/src/debug/debug_disasm.cpp b/src/debug/debug_disasm.cpp
index 5b642962..f1e2deed 100644
--- a/src/debug/debug_disasm.cpp
+++ b/src/debug/debug_disasm.cpp
@@ -283,8 +283,10 @@ static char const *second[] = {
   0,                  0,                 0,                0,
   0,                  0,                 0,                0,
 /* 3 */
-  0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0,
+  0,                  "rdtsc",           0,                0,
+  0,                  0,                 0,                0,
+  0,                  0,                 0,                0,
+  0,                  0,                 0,                0,
 /* 4 */
   0, 0, 0, 0, 0, 0, 0, 0,
   0, 0, 0, 0, 0, 0, 0, 0,