diff --git a/reactos/lib/ntdll/main/i386/dispatch.S b/reactos/lib/ntdll/main/i386/dispatch.S
index 92acfb5a30d..b3ba97e9f64 100644
--- a/reactos/lib/ntdll/main/i386/dispatch.S
+++ b/reactos/lib/ntdll/main/i386/dispatch.S
@@ -15,7 +15,7 @@
 #define EXCEPTION_NONCONTINUABLE    1
 #define EXCEPTION_UNWINDING         2
 #define EXCEPTION_EXIT_UNWIND       4
-#define EXCEPTION_UNWIND            (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND)
+#define EXCEPTION_UNWIND            (EXCEPTION_UNWINDING + EXCEPTION_EXIT_UNWIND)
 
 #define STATUS_CALLBACK_POP_STACK   0xC0000423
 
diff --git a/reactos/lib/rtl/i386/except.s b/reactos/lib/rtl/i386/except.s
index 949c92ff0ce..9f1bc163ed2 100644
--- a/reactos/lib/rtl/i386/except.s
+++ b/reactos/lib/rtl/i386/except.s
@@ -15,7 +15,7 @@
 
 #define EXCEPTION_UNWINDING         2
 #define EXCEPTION_EXIT_UNWIND       4
-#define EXCEPTION_UNWIND            (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND)
+#define EXCEPTION_UNWIND            (EXCEPTION_UNWINDING + EXCEPTION_EXIT_UNWIND)
 
 #define ExceptionContinueExecution  0
 #define ExceptionContinueSearch     1
diff --git a/reactos/ntoskrnl/ke/i386/syscall.S b/reactos/ntoskrnl/ke/i386/syscall.S
index 6a1945e1fc5..41d5b89725a 100644
--- a/reactos/ntoskrnl/ke/i386/syscall.S
+++ b/reactos/ntoskrnl/ke/i386/syscall.S
@@ -499,7 +499,9 @@ FastRet:
     /* We will be cleaning up the stack ourselves */
     pop edx                                 /* New Ring 3 EIP */
     add esp, 4                              /* Skip Ring 3 DS */
-    and dword ptr [esp], ~X86_EFLAGS_IF     /* Remove IRQ hack from EFLAGS */
+/*  and dword ptr [esp], ~X86_EFLAGS_IF        Line below is equivalent to this,
+                                               but older binutils versions don't understand ~ */
+    and dword ptr [esp], 0xfffffdff         /* Remove IRQ hack from EFLAGS */
     popf                                    /* Restore old EFLAGS */
     pop ecx                                 /* Old Ring 3 SS:ESP */