diff --git a/compiler-scopes.c b/compiler-scopes.c
index ff0fc07..f7606b4 100644
--- a/compiler-scopes.c
+++ b/compiler-scopes.c
@@ -274,53 +274,65 @@ OBJ* getbynamelist(SCOPE* s, STRINGLIST* names, char** retname) {
 // Scope adding
 void addclassvardec(SCOPE* s, CLASSVARDEC* v) {
 	ensurenoduplicates(s, v->base->names, v->base->debug);
-	v->next = s->classvardecs;
-	s->classvardecs = v;
+	CLASSVARDEC* new = copy(v, sizeof(CLASSVARDEC));
+	new->next = s->classvardecs;
+	s->classvardecs = new;
 }
 
 void addvardec(SCOPE* s, VARDEC* v) {
 	ensurenoduplicates(s, v->names, v->debug);
-	v->next = s->vardecs;
-	s->vardecs = v;
+	VARDEC* new = copy(v, sizeof(VARDEC));
+	new->next = s->vardecs;
+	s->vardecs = new;
 }
 
 void addsubdec(SCOPE* s, SUBDEC* sd) {
 	ensurenoduplicate(s, sd->name, sd->debug);
-	sd->next = s->subroutines;
-	s->subroutines = sd;
+	SUBDEC* new = copy(sd, sizeof(SUBDEC));
+	new->next = s->subroutines;
+	s->subroutines = new;
 }
 
 void addclass(SCOPE* s, CLASS* c) {
 	ensurenoduplicate(s, c->name, c->debug);
-	c->next = s->classes;
-	s->classes = c;
+	CLASS* new = copy(c, sizeof(CLASS));
+	new->next = s->classes;
+	s->classes = new;
 }
 
 // Group adding
 void addclassvardecs(SCOPE* s, CLASSVARDEC* vs) {
+	CLASSVARDEC* next;
 	while(vs != NULL) {
+		next = vs->next;
 		addclassvardec(s, vs);
-		vs = vs->next;
+		vs = next;
 	}
 }
 
 void addvardecs(SCOPE* s, VARDEC* vs) {
+	VARDEC* next;
 	while(vs != NULL) {
+		next = vs->next;
 		addvardec(s, vs);
-		vs = vs->next;
+		vs = next;
 	}
 }
 
 void addsubdecs(SCOPE* s, SUBDEC* ss) {
+	SUBDEC* next;
 	while(ss != NULL) {
+		next = ss->next;
 		addsubdec(s, ss);
-		ss = ss->next;
+		ss = next;
 	}
 }
 
 void addclasses(SCOPE* s, CLASS* c) {
+	CLASS* next;
 	while(c != NULL) {
+		next = c->next;
 		addclass(s, c);
-		c = c->next;
+		c = next;
 	}
 }
diff --git a/compiler.c b/compiler.c
index 5fda157..c63bd4c 100644
--- a/compiler.c
+++ b/compiler.c
@@ -127,7 +127,7 @@ LINEBLOCK* compilecallln(CLASS* c, SUBROUTCALL* call) {
 
 // temporary ignore list for OS functions
 char* ignoresubdecs[] = {
-	"printInt", "void"
+	"printInt", "void", "peek", "int"
 };
 int ignorecount = sizeof(ignoresubdecs) / sizeof(char*);
 
diff --git a/parser.c b/parser.c
index 6fa026d..f338f7d 100644
--- a/parser.c
+++ b/parser.c
@@ -106,6 +106,7 @@ TERM* parsetermnullified(PARSER* p) {
 		t->type = unaryopterm;
 		next(p);
 		t->expression = parseterm(p);
+		t->expression->next = NULL;
 	} else if(!strcmp(p->current->token, "(")) {
 		next(p);
 		t->type = innerexpression;
@@ -148,7 +149,7 @@ TERM* parseexpressionnullified(PARSER* p) {
 	while(isop(p->current)) {
 		current->op = p->current->token[0]; 
 		next(p);
-		nextt = parsetermnullified(p);
+		nextt = parseterm(p);
 		current->next = nextt;
 		current = nextt;
 	}
@@ -466,6 +467,7 @@ PARAMETER* parseparameters(PARSER* p) {
 	PARAMETER* head = parseparameter(p);
 	PARAMETER* current = head;
 	while(!strcmp(p->current->token, ",")) {
+		next(p);
 		current->next = parseparameter(p);
 		current = current->next;
 	}
@@ -518,7 +520,7 @@ SUBDEC* parsesubroutdec(PARSER* p) {
 
 SUBDEC* parsesubroutdecs(PARSER* p) {
 	SUBDEC* head = parsesubroutdec(p);
-	SUBDEC* current= head;
+	SUBDEC* current = head;
 	SUBDEC* next;
 	while(next = parsesubroutdec(p), next != NULL) {
 		current->next = next;
diff --git a/util.c b/util.c
index 30f53fa..cbfc2dd 100644
--- a/util.c
+++ b/util.c
@@ -13,6 +13,12 @@ char* ezheapstr(char* str) {
 	return heapstr(str, strlen(str));
 }
 
+void* copy(void* v, int sz) {
+	void* copy = malloc(sz);
+	memcpy(copy, v, sz);
+	return copy;
+}
+
 int countplaces(int n) {
 	int places = 1;
 	int divisor = 1;
diff --git a/util.h b/util.h
index d606c3c..61521c6 100644
--- a/util.h
+++ b/util.h
@@ -14,6 +14,7 @@ char* heapstr(char* str, int len);
 char* ezheapstr(char* str);
 int countplaces(int n);
 char* itoa(int i);
+void* copy(void* v, int sz);
 
 void printstrlist(STRINGLIST* strlist, FILE* stream);
 void freestrlist(STRINGLIST* strlist);