diff --git a/libHBAAPI/hbaapi.h b/libHBAAPI/hbaapi.h
index 58098e0..952a02c 100644
--- a/libHBAAPI/hbaapi.h
+++ b/libHBAAPI/hbaapi.h
@@ -523,17 +523,17 @@ typedef void *	HBA_CALLBACKHANDLE;
 #define HBA_EVENT_LINK_UNKNOWN		0x500
 #define HBA_EVENT_LINK_INCIDENT		0x501
 
-HBA_API HBA_UINT32 HBA_GetVersion();
+HBA_API HBA_UINT32 HBA_GetVersion(void);
 
 /*
  * Make sure HBA_LoadLibrary returns before any other threads
  * make calls to the library
  */
-HBA_API HBA_STATUS HBA_LoadLibrary();
+HBA_API HBA_STATUS HBA_LoadLibrary(void);
 
-HBA_API HBA_STATUS HBA_FreeLibrary();
+HBA_API HBA_STATUS HBA_FreeLibrary(void);
 
-HBA_API HBA_UINT32 HBA_GetNumberOfAdapters();
+HBA_API HBA_UINT32 HBA_GetNumberOfAdapters(void);
 
 HBA_API HBA_STATUS HBA_GetAdapterName(
     HBA_UINT32		adapterindex,
@@ -602,7 +602,7 @@ HBA_API HBA_STATUS HBA_SendCTPassThru(
     HBA_UINT32		RspBufferSize
     );
 
-HBA_API void HBA_RefreshAdapterConfiguration();
+HBA_API void HBA_RefreshAdapterConfiguration(void);
 
 HBA_API HBA_STATUS HBA_GetEventBuffer(
     HBA_HANDLE		handle,
diff --git a/libHBAAPI/vendorhbaapi.h b/libHBAAPI/vendorhbaapi.h
index ca27045..6e14636 100644
--- a/libHBAAPI/vendorhbaapi.h
+++ b/libHBAAPI/vendorhbaapi.h
@@ -44,10 +44,10 @@ extern "C" {
 
 
 /* 6.10.1 HBA Library Function Table */
-typedef HBA_UINT32	(* HBAGetVersionFunc)();
-typedef HBA_STATUS	(* HBALoadLibraryFunc)();
-typedef HBA_STATUS	(* HBAFreeLibraryFunc)();
-typedef HBA_UINT32	(* HBAGetNumberOfAdaptersFunc)();
+typedef HBA_UINT32	(* HBAGetVersionFunc)(void);
+typedef HBA_STATUS	(* HBALoadLibraryFunc)(void);
+typedef HBA_STATUS	(* HBAFreeLibraryFunc)(void);
+typedef HBA_UINT32	(* HBAGetNumberOfAdaptersFunc)(void);
 typedef HBA_STATUS	(* HBAGetAdapterNameFunc)(HBA_UINT32, char *);
 /*
  * Open Adapter.... the vendor function is limmited to 16 bits,
@@ -72,7 +72,7 @@ typedef HBA_STATUS	(* HBAGetPortAttributesByWWNFunc)
 typedef HBA_STATUS	(* HBASendCTPassThruV2Func)
     (HBA_HANDLE, HBA_WWN, void *, HBA_UINT32, void *, HBA_UINT32 *);
 typedef void		(* HBARefreshInformationFunc)(HBA_HANDLE);
-typedef void		(* HBARefreshAdapterConfigurationFunc) ();
+typedef void		(* HBARefreshAdapterConfigurationFunc) (void);
 typedef void		(* HBAResetStatisticsFunc)(HBA_HANDLE, HBA_UINT32);
 typedef HBA_STATUS	(* HBAGetFcpTargetMappingV2Func)
     (HBA_HANDLE, HBA_WWN, HBA_FCPTARGETMAPPINGV2 *);