diff --git a/reactos/ntoskrnl/include/internal/ctype.h b/reactos/ntoskrnl/include/internal/ctype.h
index 6f3e18179b5..17ae46a6b04 100644
--- a/reactos/ntoskrnl/include/internal/ctype.h
+++ b/reactos/ntoskrnl/include/internal/ctype.h
@@ -39,5 +39,6 @@ extern inline int tolower(int c);
 extern inline int islower(int c);
 extern inline int isdigit(int c);
 extern inline int isxdigit(int c);
+extern inline int isprint(int c);
 
 #endif
diff --git a/reactos/ntoskrnl/mm/procsup.c b/reactos/ntoskrnl/mm/procsup.c
index 5b8fe20777a..a15a60401a7 100644
--- a/reactos/ntoskrnl/mm/procsup.c
+++ b/reactos/ntoskrnl/mm/procsup.c
@@ -485,6 +485,7 @@ MmInitializeHandBuiltProcess2(IN PEPROCESS Process)
     PHYSICAL_ADDRESS BoundaryAddressMultiple;
     NTSTATUS Status;
     PMADDRESS_SPACE ProcessAddressSpace = (PMADDRESS_SPACE)&Process->VadRoot;
+    BoundaryAddressMultiple.QuadPart = 0;
 
     /* Create the shared data page */
     BaseAddress = (PVOID)USER_SHARED_DATA;