diff --git a/src/include/stddef.h b/src/include/stddef.h
index 3a030e1..60e3459 100644
--- a/src/include/stddef.h
+++ b/src/include/stddef.h
@@ -49,4 +49,11 @@
 #define ROMSTAGE_CONST
 #endif
 
+/* Work around non-writable data segment in execute-in-place romstage on x86. */
+#if defined(__PRE_RAM__) && CONFIG_ARCH_X86
+#define MAYBE_STATIC
+#else
+#define MAYBE_STATIC static
+#endif
+
 #endif /* STDDEF_H */