diff --git a/src/mzscheme/include/schthread.h b/src/mzscheme/include/schthread.h
index 7d49a5552a..daa47e1a72 100644
--- a/src/mzscheme/include/schthread.h
+++ b/src/mzscheme/include/schthread.h
@@ -216,6 +216,7 @@ typedef struct Thread_Local_Variables {
   unsigned long current_total_allocation_;
   struct gmp_tmp_stack gmp_tmp_xxx_;
   struct gmp_tmp_stack *gmp_tmp_current_;
+  struct Scheme_Logger *scheme_main_logger_;
 } Thread_Local_Variables;
 
 #if defined(IMPLEMENT_THREAD_LOCAL_VIA_PTHREADS)
@@ -398,6 +399,7 @@ XFORM_GC_VARIABLE_STACK_THROUGH_THREAD_LOCAL;
 #define current_total_allocation XOA (scheme_get_thread_local_variables()->current_total_allocation_)
 #define gmp_tmp_xxx XOA (scheme_get_thread_local_variables()->gmp_tmp_xxx_)
 #define gmp_tmp_current XOA (scheme_get_thread_local_variables()->gmp_tmp_current_)
+#define scheme_main_logger XOA (scheme_get_thread_local_variables()->scheme_main_logger_)
 
 /* **************************************** */
 
diff --git a/src/mzscheme/src/env.c b/src/mzscheme/src/env.c
index c98945537b..312af4e013 100644
--- a/src/mzscheme/src/env.c
+++ b/src/mzscheme/src/env.c
@@ -439,6 +439,7 @@ static Scheme_Env *place_instance_init_post_kernel() {
   }
   scheme_init_error_escape_proc(NULL);
   scheme_init_print_buffers_places();
+  scheme_init_logger();
   scheme_init_eval_places();
   scheme_init_regexp_places();
   scheme_init_stx_places();
@@ -453,6 +454,7 @@ static Scheme_Env *place_instance_init_post_kernel() {
   scheme_init_port_config();
   scheme_init_port_fun_config();
   scheme_init_error_config();
+  scheme_init_logger_config();
 #ifndef NO_SCHEME_EXNS
   scheme_init_exn_config();
 #endif
diff --git a/src/mzscheme/src/error.c b/src/mzscheme/src/error.c
index dd0e2ea92f..5f72cf30ef 100644
--- a/src/mzscheme/src/error.c
+++ b/src/mzscheme/src/error.c
@@ -50,8 +50,7 @@ void (*scheme_console_output)(char *str, long len);
 
 static int init_syslog_level = INIT_SYSLOG_LEVEL;
 static int init_stderr_level = SCHEME_LOG_ERROR;
-Scheme_Logger *scheme_main_logger;
-static void init_logger_config();
+THREAD_LOCAL_DECL(static Scheme_Logger *scheme_main_logger);
 
 /* readonly globals */
 const char *scheme_compile_stx_string = "compile";
@@ -589,7 +588,13 @@ void scheme_init_error(Scheme_Env *env)
   scheme_add_evt(scheme_log_reader_type, (Scheme_Ready_Fun)log_reader_get, NULL, NULL, 1);
 
   REGISTER_SO(scheme_def_exit_proc);
+  REGISTER_SO(default_display_handler);
+  REGISTER_SO(emergency_display_handler);
+
   scheme_def_exit_proc = scheme_make_prim_w_arity(def_exit_handler_proc, "default-exit-handler", 1, 1);
+  default_display_handler = scheme_make_prim_w_arity(def_error_display_proc, "default-error-display-handler", 2, 2);
+  emergency_display_handler = scheme_make_prim_w_arity(emergency_error_display_proc, "emergency-error-display-handler", 2, 2);
+  
 
   REGISTER_SO(def_err_val_proc);
   def_err_val_proc = scheme_make_prim_w_arity(def_error_value_string_proc, "default-error-value->string-handler", 2, 2);
@@ -605,14 +610,6 @@ void scheme_init_error(Scheme_Env *env)
   info_symbol     = scheme_intern_symbol("info");
   debug_symbol    = scheme_intern_symbol("debug");
 
-  {
-    REGISTER_SO(scheme_main_logger);
-    scheme_main_logger = make_a_logger(NULL, NULL);
-    scheme_main_logger->syslog_level = init_syslog_level;
-    scheme_main_logger->stderr_level = init_stderr_level;
-  }
-  init_logger_config();
-
   REGISTER_SO(arity_property);
   {
     Scheme_Object *guard;
@@ -625,27 +622,29 @@ void scheme_init_error(Scheme_Env *env)
   scheme_init_error_config();
 }
 
-static void init_logger_config()
+void scheme_init_logger()
 {
-  scheme_set_root_param(MZCONFIG_LOGGER, (Scheme_Object *)scheme_main_logger);
+  REGISTER_SO(scheme_main_logger);
+  scheme_main_logger = make_a_logger(NULL, NULL);
+  scheme_main_logger->syslog_level = init_syslog_level;
+  scheme_main_logger->stderr_level = init_stderr_level;
+}
+
+Scheme_Logger *scheme_get_main_logger() {
+  return scheme_main_logger;
 }
 
 void scheme_init_error_config(void)
 {
-  init_logger_config();
-
   scheme_set_root_param(MZCONFIG_EXIT_HANDLER, scheme_def_exit_proc);
-  
-  REGISTER_SO(default_display_handler);
-  REGISTER_SO(emergency_display_handler);
-
-  default_display_handler = scheme_make_prim_w_arity(def_error_display_proc, "default-error-display-handler", 2, 2);
-  emergency_display_handler = scheme_make_prim_w_arity(emergency_error_display_proc, "emergency-error-display-handler", 2, 2);
-  
   scheme_set_root_param(MZCONFIG_ERROR_DISPLAY_HANDLER, default_display_handler);
   scheme_set_root_param(MZCONFIG_ERROR_PRINT_VALUE_HANDLER, def_err_val_proc);
 }
 
+void scheme_init_logger_config() {
+  scheme_set_root_param(MZCONFIG_LOGGER, (Scheme_Object *)scheme_main_logger);
+}
+
 static void
 scheme_inescapeable_error(const char *a, const char *b)
 {
diff --git a/src/mzscheme/src/schpriv.h b/src/mzscheme/src/schpriv.h
index c7579f2353..ff26738435 100644
--- a/src/mzscheme/src/schpriv.h
+++ b/src/mzscheme/src/schpriv.h
@@ -235,6 +235,9 @@ void scheme_init_fun_places(void);
 void scheme_init_sema_places(void);
 void scheme_init_gmp_places(void);
 void scheme_init_print_global_constants(void);
+void scheme_init_logger(void);
+Scheme_Logger *scheme_get_main_logger(void);
+void scheme_init_logger_config(void);
 
 void register_network_evts();
 
@@ -2944,8 +2947,6 @@ typedef struct Scheme_Log_Reader {
   Scheme_Object *head, *tail;
 } Scheme_Log_Reader;
 
-extern Scheme_Logger *scheme_main_logger;
-
 char *scheme_optimize_context_to_string(Scheme_Object *context);
 
 void scheme_write_proc_context(Scheme_Object *port, int print_width,
diff --git a/src/mzscheme/src/thread.c b/src/mzscheme/src/thread.c
index 780af68acb..86995727bc 100644
--- a/src/mzscheme/src/thread.c
+++ b/src/mzscheme/src/thread.c
@@ -7408,7 +7408,8 @@ static void done_with_GC()
 #ifdef MZ_PRECISE_GC
 static void inform_GC(int major_gc, long pre_used, long post_used)
 {
-  if (scheme_main_logger) {
+  Scheme_Logger *logger = scheme_get_main_logger();
+  if (logger) {
     /* Don't use scheme_log(), because it wants to allocate a buffer
        based on the max value-print width, and we may not be at a
        point where parameters are available. */
@@ -7422,10 +7423,7 @@ static void inform_GC(int major_gc, long pre_used, long post_used)
             end_this_gc_time - start_this_gc_time);
     buflen = strlen(buf);
 
-    scheme_log_message(scheme_main_logger,
-                       SCHEME_LOG_DEBUG,
-                       buf, buflen,
-                       NULL);
+    scheme_log_message(logger, SCHEME_LOG_DEBUG, buf, buflen, NULL);
   }
 
 }