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-rw-r--r--PcAtChipsetPkg/Include/Library/IoApicLib.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/PcAtChipsetPkg/Include/Library/IoApicLib.h b/PcAtChipsetPkg/Include/Library/IoApicLib.h
index bd9054be5..c3eb0ce4b 100644
--- a/PcAtChipsetPkg/Include/Library/IoApicLib.h
+++ b/PcAtChipsetPkg/Include/Library/IoApicLib.h
@@ -14,6 +14,8 @@
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
+#ifndef __IO_APIC_LIB_H__
+#define __IO_APIC_LIB_H__
/**
Read a 32-bit I/O APIC register.
@@ -100,3 +102,4 @@ IoApicConfigureInterrupt (
IN BOOLEAN LevelTriggered,
IN BOOLEAN AssertionLevel
);
+#endif