diff --git a/main/php.h b/main/php.h
index 305724ff24e..d66d782098e 100644
--- a/main/php.h
+++ b/main/php.h
@@ -370,7 +370,6 @@ extern void html_putc(char c);
 #ifndef THREAD_SAFE
 extern int end_current_file_execution(int *retval);
 #endif
-extern int _php3_hash_environment(PLS_D);
 extern int module_startup_modules(void);
 
 /* needed for modules only */