diff --git a/src/southbridge/winbond/w83c553/chip.h b/src/southbridge/winbond/w83c553/chip.h
index 8e387fba28..0edcbb0f89 100644
--- a/src/southbridge/winbond/w83c553/chip.h
+++ b/src/southbridge/winbond/w83c553/chip.h
@@ -1,2 +1,9 @@
+#ifndef _SOUTHBRIDGE_WINBOND_W83C553
+#define _SOUTHBRIDGE_WINBOND_W83C553
+
+extern struct chip_control southbridge_winbond_w83c553_control;
+
 struct southbridge_winbond_w83c553_config {
 };
+
+#endif /* _SOUTHBRIDGE_WINBOND_W83C553 */
diff --git a/src/superio/NSC/pc97307/chip.h b/src/superio/NSC/pc97307/chip.h
index 4839ae54f1..8bdaec461d 100644
--- a/src/superio/NSC/pc97307/chip.h
+++ b/src/superio/NSC/pc97307/chip.h
@@ -1,3 +1,6 @@
+#ifndef _SUPERIO_NSC_PC97307
+#define _SUPERIO_NSC_PC97307
+
 #ifndef PNP_INDEX_REG
 #define PNP_INDEX_REG   0x15C
 #endif
@@ -11,8 +14,11 @@
 #define SIO_COM2_BASE   0x2F8
 #endif
 
+extern struct chip_control superio_NSC_pc97307_control;
+
 struct superio_NSC_pc97307_config {
     struct com_ports com1;
     struct lpt_ports lpt;
     int port;
 };
+#endif /* _SUPERIO_NSC_PC97307 */