diff --git a/src/lisp/x86-validate-linux.h b/src/lisp/x86-validate-linux.h
index 7b22a1aaaa7cd2743f694a78bcdea3ed1ba3b9ec..36688340c6bd2db3da5d65dae2bf8e871f499f13 100644
--- a/src/lisp/x86-validate-linux.h
+++ b/src/lisp/x86-validate-linux.h
@@ -45,17 +45,17 @@
 #define STATIC_SPACE_START	(SpaceStart_TargetStatic)
 #define STATIC_SPACE_SIZE	(0x0ffff000)	/* 256MB - 1 page */
 
-#ifndef RELOCATABLE_STACK_START
+#ifndef FEATURE_RELOCATABLE_STACKS
 #define BINDING_STACK_START	(0x20000000)
 #endif
 #define BINDING_STACK_SIZE	(0x07fff000)	/* 128MB - 1 page */
 
-#ifndef RELOCATABLE_STACK_START
+#ifndef FEATURE_RELOCATABLE_STACKS
 #define CONTROL_STACK_START	0x38000000
 #endif
 #define CONTROL_STACK_SIZE	(0x07fff000 - 8192)
 
-#ifndef RELOCATABLE_STACK_START
+#ifndef FEATURE_RELOCATABLE_STACKS
 #define SIGNAL_STACK_START	CONTROL_STACK_END
 #endif
 #define SIGNAL_STACK_SIZE	SIGSTKSZ