diff --git a/lib.c b/lib.c
index e439b5a..f2677c4 100644
--- a/lib.c
+++ b/lib.c
@@ -455,7 +455,7 @@ static int ink_consume_one(int* end, struct context* pContext, char** buffer, ch
 	return 0;
 }
 
-static int ink_lex(struct context *pContext, char* buffer) {
+static int ink_lex(struct context *pContext, const char* buffer) {
 	/* Limits the token size to 127 chars */
 	char r[128];
 	int end;
@@ -1233,22 +1233,41 @@ static void is_different(struct context* ctx) {
 #ifndef NOEXTRAARITHMETIC
 
 static void rem_int(struct context* ctx) {
-	struct ink_routine* currentRoutine;
-	struct elem a;
-	struct elem b;
-	currentRoutine = ctx->routines + ctx->routine_current;
-	if(currentRoutine->top < 2) {
-		currentRoutine->panic = -1;
-		return;
-	}
-	a =  currentRoutine->stack[currentRoutine->top-1];
-	b =  currentRoutine->stack[currentRoutine->top-2];
-	if(!(a.type == INK_INTEGER && b.type == INK_INTEGER)) {
-		currentRoutine->panic = -1;
-		return;
-	}
-	ink_pop(ctx);
-	currentRoutine->stack[currentRoutine->top-1].value = b.value % a.value;
+    struct ink_routine* currentRoutine;
+    struct elem a;
+    struct elem b;
+    currentRoutine = ctx->routines + ctx->routine_current;
+    if(currentRoutine->top < 2) {
+        currentRoutine->panic = -1;
+        return;
+    }
+    a =  currentRoutine->stack[currentRoutine->top-1];
+    b =  currentRoutine->stack[currentRoutine->top-2];
+    if(!(a.type == INK_INTEGER && b.type == INK_INTEGER)) {
+        currentRoutine->panic = -1;
+        return;
+    }
+    ink_pop(ctx);
+    currentRoutine->stack[currentRoutine->top-1].value = b.value % a.value;
+}
+
+static void xor_int(struct context* ctx) {
+    struct ink_routine* currentRoutine;
+    struct elem a;
+    struct elem b;
+    currentRoutine = ctx->routines + ctx->routine_current;
+    if(currentRoutine->top < 2) {
+        currentRoutine->panic = -1;
+        return;
+    }
+    a =  currentRoutine->stack[currentRoutine->top-1];
+    b =  currentRoutine->stack[currentRoutine->top-2];
+    if(!(a.type == INK_INTEGER && b.type == INK_INTEGER)) {
+        currentRoutine->panic = -1;
+        return;
+    }
+    ink_pop(ctx);
+    currentRoutine->stack[currentRoutine->top-1].value = b.value ^ a.value;
 }
 
 static void gt_int(struct context* ctx) {
@@ -1874,7 +1893,8 @@ int ink_std_library(struct context* ctx) {
 	v += ink_add_native(ctx, ">", gt_int);
 	v += ink_add_native(ctx, ">=", gte_int);
 	v += ink_add_native(ctx, "=<", lte_int);
-	v += ink_add_native(ctx, "%", rem_int);
+    v += ink_add_native(ctx, "%", rem_int);
+    v += ink_add_native(ctx, "int.xor", xor_int);
 #endif // NOEXTRAARITHMETIC
 #ifndef NOARRAYLIB
 	ink_new_type(ctx, "array", sizeof(struct ink_array), collect_array, gc_array);