diff --git a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/device/TOOLCHAIN_GCC_ARM/startup_W7500.S b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
index 2808b2ad57..48966901cb 100644
--- a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
+++ b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
@@ -188,8 +188,8 @@ Reset_Handler:
 .LC3:
 #endif /* __STARTUP_CLEAR_BSS */
 
-    /*bl    _start*/
-    bl main
+    bl    _start
+    //bl main
 
     .pool
     .size Reset_Handler, . - Reset_Handler
diff --git a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.S b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
index 2808b2ad57..48966901cb 100644
--- a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
+++ b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
@@ -188,8 +188,8 @@ Reset_Handler:
 .LC3:
 #endif /* __STARTUP_CLEAR_BSS */
 
-    /*bl    _start*/
-    bl main
+    bl    _start
+    //bl main
 
     .pool
     .size Reset_Handler, . - Reset_Handler
diff --git a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.o b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.o
deleted file mode 100644
index 6154940481..0000000000
Binary files a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500ECO/device/TOOLCHAIN_GCC_ARM/startup_W7500.o and /dev/null differ
diff --git a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500P/device/TOOLCHAIN_GCC_ARM/startup_W7500.S b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500P/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
index 2808b2ad57..48966901cb 100644
--- a/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500P/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
+++ b/targets/TARGET_WIZNET/TARGET_W7500x/TARGET_WIZwiki_W7500P/device/TOOLCHAIN_GCC_ARM/startup_W7500.S
@@ -188,8 +188,8 @@ Reset_Handler:
 .LC3:
 #endif /* __STARTUP_CLEAR_BSS */
 
-    /*bl    _start*/
-    bl main
+    bl    _start
+    //bl main
 
     .pool
     .size Reset_Handler, . - Reset_Handler
diff --git a/targets/TARGET_WIZNET/mbed_rtx.h b/targets/TARGET_WIZNET/mbed_rtx.h
index 922758c206..c475509da1 100644
--- a/targets/TARGET_WIZNET/mbed_rtx.h
+++ b/targets/TARGET_WIZNET/mbed_rtx.h
@@ -47,8 +47,6 @@
 #define OS_CLOCK                20000000
 #endif
 
-#endif
-
 #elif defined(TARGET_WIZWIKI_W7500ECO)
 
 #ifndef INITIAL_SP
@@ -64,4 +62,6 @@
 #define OS_CLOCK                20000000
 #endif
 
+#endif //
+
 #endif // MBED_MBED_RTX_H