diff --git a/config/debug/ltrace.in b/config/debug/ltrace.in
index d2d3b562..6b7c029f 100644
--- a/config/debug/ltrace.in
+++ b/config/debug/ltrace.in
@@ -20,6 +20,11 @@ config LTRACE_V_0_5
     bool
     prompt "0.5"
 
+config LTRACE_V_0_5_1
+    bool
+    prompt "0.5.1  (EXPERIMENTAL)"
+    depends on EXPERIMENTAL
+
 # CT_INSERT_VERSION_ABOVE
 # Don't remove above line!
 endchoice
@@ -28,5 +33,6 @@ config LTRACE_VERSION
     string
     default "0.4" if LTRACE_V_0_4
     default "0.5" if LTRACE_V_0_5
+    default "0.5.1" if LTRACE_V_0_5_1
 # CT_INSERT_VERSION_STRING_ABOVE
 # # Don't remove above line!