diff --git a/reactos/include/reactos/arc/arc.h b/reactos/include/reactos/arc/arc.h
index f1401bf76ec..b57001bae81 100644
--- a/reactos/include/reactos/arc/arc.h
+++ b/reactos/include/reactos/arc/arc.h
@@ -412,7 +412,8 @@ typedef struct _FIRMWARE_INFORMATION_LOADER_BLOCK
 {
     ULONG FirmwareTypeEfi:1;
     ULONG Reserved:31;
-    union {
+    union
+    {
         EFI_FIRMWARE_INFORMATION EfiInformation;
         PCAT_FIRMWARE_INFORMATION PcatInformation;
     } u;
@@ -447,7 +448,7 @@ typedef struct _LOADER_PARAMETER_BLOCK
     {
         I386_LOADER_BLOCK I386;
         ALPHA_LOADER_BLOCK Alpha;
-        IA64_LOADER_BLOCK Ia64;
+        IA64_LOADER_BLOCK IA64;
         PPC_LOADER_BLOCK PowerPC;
         ARM_LOADER_BLOCK Arm;
     } u;
diff --git a/reactos/include/reactos/arc/setupblk.h b/reactos/include/reactos/arc/setupblk.h
index 7edc13e04c6..4ee17414787 100644
--- a/reactos/include/reactos/arc/setupblk.h
+++ b/reactos/include/reactos/arc/setupblk.h
@@ -1,6 +1,12 @@
 #ifndef _SETUPBLK_
 #define _SETUPBLK_
 
+//
+// Setup Flags
+//
+#define SETUPLDR_TEXT_MODE    0x1
+#define SETUPLDR_REMOTE_BOOT  0x2
+
 //
 // Type of file described in DETECTED_DEVICE_FILE
 //
diff --git a/reactos/ntoskrnl/ex/init.c b/reactos/ntoskrnl/ex/init.c
index c9243ff9d4a..89f09f0bbce 100644
--- a/reactos/ntoskrnl/ex/init.c
+++ b/reactos/ntoskrnl/ex/init.c
@@ -869,10 +869,10 @@ ExpInitializeExecutive(IN ULONG Cpu,
     if (LoaderBlock->SetupLdrBlock)
     {
         /* Check if this is text-mode setup */
-        if (LoaderBlock->SetupLdrBlock->Flags & 1) ExpInTextModeSetup = TRUE;
+        if (LoaderBlock->SetupLdrBlock->Flags & SETUPLDR_TEXT_MODE) ExpInTextModeSetup = TRUE;
 
         /* Check if this is network boot */
-        if (LoaderBlock->SetupLdrBlock->Flags & 2)
+        if (LoaderBlock->SetupLdrBlock->Flags & SETUPLDR_REMOTE_BOOT)
         {
             /* Set variable */
             IoRemoteBootClient = TRUE;
diff --git a/reactos/ntoskrnl/ke/freeldr.c b/reactos/ntoskrnl/ke/freeldr.c
index ce70a634c0c..8c406bbbd78 100644
--- a/reactos/ntoskrnl/ke/freeldr.c
+++ b/reactos/ntoskrnl/ke/freeldr.c
@@ -31,7 +31,7 @@ typedef struct _BIOS_MEMORY_DESCRIPTOR
 
 /* FreeLDR Loader Data */
 PROS_LOADER_PARAMETER_BLOCK KeRosLoaderBlock;
-BOOLEAN AcpiTableDetected;
+BOOLEAN AcpiTableDetected = FALSE;
 ADDRESS_RANGE KeMemoryMap[64];
 ULONG KeMemoryMapRangeCount;
 
@@ -1187,7 +1187,7 @@ KiRosFrldrLpbToNtLpb(IN PROS_LOADER_PARAMETER_BLOCK RosLoaderBlock,
     if (LoaderBlock->SetupLdrBlock)
     {
         /* All we'll setup right now is the flag for text-mode setup */
-        LoaderBlock->SetupLdrBlock->Flags = 1;
+        LoaderBlock->SetupLdrBlock->Flags = SETUPLDR_TEXT_MODE;
     }
 
     /* Make a copy of the command line */