diff --git a/src/openocd.h b/src/openocd.h
index 70e3ee012..a91d46f2f 100644
--- a/src/openocd.h
+++ b/src/openocd.h
@@ -37,6 +37,6 @@ void openocd_sleep_prelude(void);
 void openocd_sleep_postlude(void);
 
 /// provides a hard-coded command environment setup
-extern const char *openocd_startup_tcl;
+extern const char openocd_startup_tcl[];
 
 #endif