diff --git a/changes/bug22802 b/changes/bug22802
new file mode 100644
index 0000000000..7255164fd4
--- /dev/null
+++ b/changes/bug22802
@@ -0,0 +1,10 @@
+  o Minor bugfixes (format strictness):
+    - Restrict several data formats to decimal. Previously, the
+      BuildTimeHistogram entries in the state file, the "bw=" entries in the
+      bandwidth authority file, and process IDs passed to the
+      __OwningControllerProcess option could all be specified in hex or octal
+      as well as in decimal.  This was not an intentional feature.
+      Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha, and
+      0.2.2.28-beta.
+
+
diff --git a/src/common/procmon.c b/src/common/procmon.c
index d49e7f18f5..5ef16c7268 100644
--- a/src/common/procmon.c
+++ b/src/common/procmon.c
@@ -71,7 +71,7 @@ parse_process_specifier(const char *process_spec,
 
   /* If we're lucky, long will turn out to be large enough to hold a
    * PID everywhere that Tor runs. */
-  pid_l = tor_parse_long(process_spec, 0, 1, LONG_MAX, &pid_ok, &pspec_next);
+  pid_l = tor_parse_long(process_spec, 10, 1, LONG_MAX, &pid_ok, &pspec_next);
 
   /* Reserve room in the ‘process specifier’ for additional
    * (platform-specific) identifying information beyond the PID, to
diff --git a/src/common/util.c b/src/common/util.c
index eff678d6a4..31d42a3e5c 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -1233,15 +1233,7 @@ tor_parse_uint64(const char *s, int base, uint64_t min,
 #ifdef HAVE_STRTOULL
   r = (uint64_t)strtoull(s, &endptr, base);
 #elif defined(_WIN32)
-#if defined(_MSC_VER) && _MSC_VER < 1300
-  tor_assert(base <= 10);
-  r = (uint64_t)_atoi64(s);
-  endptr = (char*)s;
-  while (TOR_ISSPACE(*endptr)) endptr++;
-  while (TOR_ISDIGIT(*endptr)) endptr++;
-#else
   r = (uint64_t)_strtoui64(s, &endptr, base);
-#endif
 #elif SIZEOF_LONG == 8
   r = (uint64_t)strtoul(s, &endptr, base);
 #else
diff --git a/src/or/circuitstats.c b/src/or/circuitstats.c
index 51d580a1a4..963892c9d1 100644
--- a/src/or/circuitstats.c
+++ b/src/or/circuitstats.c
@@ -939,7 +939,7 @@ circuit_build_times_parse_state(circuit_build_times_t *cbt,
       uint32_t count, k;
       build_time_t ms;
       int ok;
-      ms = (build_time_t)tor_parse_ulong(ms_str, 0, 0,
+      ms = (build_time_t)tor_parse_ulong(ms_str, 10, 0,
                                          CBT_BUILD_TIME_MAX, &ok, NULL);
       if (!ok) {
         log_warn(LD_GENERAL, "Unable to parse circuit build times: "
@@ -949,7 +949,7 @@ circuit_build_times_parse_state(circuit_build_times_t *cbt,
         smartlist_free(args);
         break;
       }
-      count = (uint32_t)tor_parse_ulong(count_str, 0, 0,
+      count = (uint32_t)tor_parse_ulong(count_str, 10, 0,
                                         UINT32_MAX, &ok, NULL);
       if (!ok) {
         log_warn(LD_GENERAL, "Unable to parse circuit build times: "
diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index e5654e3b90..01f70858ea 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -2700,7 +2700,7 @@ measured_bw_line_parse(measured_bw_line_t *out, const char *orig_line)
       }
       cp+=strlen("bw=");
 
-      out->bw_kb = tor_parse_long(cp, 0, 0, LONG_MAX, &parse_ok, &endptr);
+      out->bw_kb = tor_parse_long(cp, 10, 0, LONG_MAX, &parse_ok, &endptr);
       if (!parse_ok || (*endptr && !TOR_ISSPACE(*endptr))) {
         log_warn(LD_DIRSERV, "Invalid bandwidth in bandwidth file line: %s",
                  escaped(orig_line));