diff --git a/src/c/stacks.d b/src/c/stacks.d
index a9eda6750..cfa561182 100644
--- a/src/c/stacks.d
+++ b/src/c/stacks.d
@@ -668,22 +668,4 @@ init_stacks(cl_env_ptr env)
 	ihs_org.function = Cnil;
 	ihs_org.lex_env = Cnil;
 	ihs_org.index = 0;
-
-#if 0 /* defined(HAVE_SIGPROCMASK) && defined(SA_SIGINFO) && defined(SA_ONSTACK) */
-	if (ecl_option_values[ECL_OPT_SIGALTSTACK_SIZE]) {
-		stack_t new_stack;
-		cl_index size = ecl_option_values[ECL_OPT_SIGALTSTACK_SIZE];
-		if (size < SIGSTKSZ) {
-			size = SIGSTKSZ + (sizeof(double)*16) +
-				(sizeof(cl_object)*4);
-		}
-		env->altstack_size = size;
-		env->altstack = ecl_alloc_atomic(size);
-		memset(&new_stack, 0, sizeof(new_stack));
-		new_stack.ss_size = env->altstack_size;
-		new_stack.ss_sp = env->altstack;
-		new_stack.ss_flags = 0;
-		sigaltstack(&new_stack, NULL);
-	}
-#endif
 }
diff --git a/src/c/unixint.d b/src/c/unixint.d
index 2c635cec8..0ccca7b97 100644
--- a/src/c/unixint.d
+++ b/src/c/unixint.d
@@ -215,11 +215,6 @@ mysignal(int code, void (*handler)(int, siginfo_t *, void*))
 #ifdef SA_SIGINFO
                 action.sa_sigaction = handler;
                 action.sa_flags = SA_SIGINFO;
-# if 0 && defined(SA_ONSTACK)
-                if (code == SIGSEGV) {
-                        action.sa_flags |= SA_ONSTACK;
-                }
-# endif
 #else
                 action.sa_handler = handler;
                 action.sa_flags = 0;