diff --git a/HISTORY b/HISTORY
index 4bea70296493c178aaa90646062393961918e417..608b33f8fcf471dd94bfe15c749c7548b96d5407 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,5 @@
 
-Version 1.06  2014-06-17
+Version 1.06  2014-06-18
   * update source code from FastDFS V5.02
   * add function short2buff and buff2short
   * add object memory pool (fast_mblock.h and fast_mblock.c)
@@ -10,6 +10,7 @@ Version 1.06  2014-06-17
   * logger can set rotate time format
   * add connection pool
   * logger can log header line
+  * #include <stdbool.h> to use C99 bool
 
 Version 1.05  2012-07-08
   * update source code from FastDFS V3.09
diff --git a/src/common_define.h b/src/common_define.h
index 5cb8128e4850a6018f54207e3cc1c0b8373df581..3a4bd2b6f9e7729a652816f4cb5ccbdb6e817d85 100644
--- a/src/common_define.h
+++ b/src/common_define.h
@@ -27,6 +27,7 @@ typedef DWORD (WINAPI *ThreadEntranceFunc)(LPVOID lpThreadParameter);
 
 #include <unistd.h>
 #include <signal.h>
+#include <stdbool.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <sys/types.h>
@@ -89,14 +90,6 @@ extern int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind);
 #define IP_ADDRESS_SIZE	16
 #define INFINITE_FILE_SIZE (256 * 1024LL * 1024 * 1024 * 1024 * 1024LL)
 
-#ifndef __cplusplus
-#ifndef true
-typedef char  bool;
-#define true  1
-#define false 0
-#endif
-#endif
-
 #ifndef byte
 #define byte signed char
 #endif