diff --git a/include/my_time.h b/include/my_time.h
index 1212f0533e2..1c549ced6b0 100644
--- a/include/my_time.h
+++ b/include/my_time.h
@@ -28,6 +28,15 @@ C_MODE_START
 
 extern ulonglong log_10_int[20];
 
+/*
+  Portable time_t replacement.
+  Should be signed and hold seconds for 1902-2038 range.
+*/
+typedef long my_time_t;
+
+#define MY_TIME_T_MAX LONG_MAX
+#define MY_TIME_T_MIN LONG_MIN
+
 #define YY_PART_YEAR	   70
 
 /* Flags to str_to_datetime */
diff --git a/include/mysql_time.h b/include/mysql_time.h
index 32da27ba33e..ec67d60dea5 100644
--- a/include/mysql_time.h
+++ b/include/mysql_time.h
@@ -17,7 +17,14 @@
 #ifndef _mysql_time_h_
 #define _mysql_time_h_
 
-/* Time declarations shared between server and client library */
+/*
+  Time declarations shared between the server and client API:
+  you should not add anything to this header unless it's used
+  (and hence should be visible) in mysql.h.
+  If you're looking for a place to add new time-related declaration,
+  it's most likely my_time.h. See also "C API Handling of Date
+  and Time Values" chapter in documentation.
+*/
 
 enum enum_mysql_timestamp_type
 {
@@ -34,13 +41,4 @@ typedef struct st_mysql_time
   enum enum_mysql_timestamp_type time_type;
 } MYSQL_TIME;
 
-
-/* 
-  Portable time_t replacement. 
-  Should be signed and hold seconds for 1902-2038 range.
-*/
-typedef long my_time_t;
-#define MY_TIME_T_MAX LONG_MAX
-#define MY_TIME_T_MIN LONG_MIN
-
 #endif /* _mysql_time_h_ */
diff --git a/sql/tztime.cc b/sql/tztime.cc
index aab0d36b61e..2ed55f2fa4e 100644
--- a/sql/tztime.cc
+++ b/sql/tztime.cc
@@ -32,6 +32,7 @@
 #include "mysql_priv.h"
 #else
 #include <my_global.h>
+#include <my_time.h>
 #include "tztime.h"
 #include <my_sys.h>
 #endif
diff --git a/sql/tztime.h b/sql/tztime.h
index 9df5f965f34..69ff176326e 100644
--- a/sql/tztime.h
+++ b/sql/tztime.h
@@ -19,8 +19,6 @@
 #pragma interface			/* gcc class interface */
 #endif
 
-#include <mysql_time.h>
-
 #if !defined(TESTTIME) && !defined(TZINFO2SQL)
 
 /*