diff --git a/src/sim_rev.h b/src/sim_rev.h
index 83828c0..c4bb1a7 100644
--- a/src/sim_rev.h
+++ b/src/sim_rev.h
@@ -30,7 +30,7 @@
 #define SIM_MAJOR       3
 #define SIM_MINOR       8
 #define SIM_PATCH       3
-#define SIM_DELTA       1
+#define SIM_DELTA       2
 
 #if defined(VM_VAX_MP)
 #  define VSMP_REVISION 1
@@ -45,6 +45,12 @@
  *    Fix Ethernet bootstrap (>>> B XQ).
  *    Prior to the fix, VAX MP would not boot over Ethernet due to
  *    "unsupported operation" abort in SSC clock code.
+ *
+ * Delta 3.8.3 (2)
+ *
+ *    Fix CPU toplogy recognition in the case of non-hyperthreaded processors under Windows.
+ *    Prior to this fix VAX MP would refuse to enable multiprocessing
+ *    via CPU MULTI <n> command in the described configuration.
  */
 
 /* V3.8 revision history
diff --git a/src/sim_threads.cpp b/src/sim_threads.cpp
index 98553d2..6c3cd17 100644
--- a/src/sim_threads.cpp
+++ b/src/sim_threads.cpp
@@ -2041,6 +2041,10 @@ static t_bool smp_init_info()
         }
     }
 
+    /* non-hyperthreaded processors */
+    if (max_per_core == 0)
+        max_per_core = 1;
+
     free(pBuffer);
 
     smp_smt_per_core = max_per_core;