diff --git a/src/operations/node.c b/src/operations/node.c
index 01c71e9..191e3e1 100644
--- a/src/operations/node.c
+++ b/src/operations/node.c
@@ -14,7 +14,7 @@ struct Node* make_node(int type, struct Value* value, char* id) {
   int i;
 
   /* allocate space */
-  struct Node* node = malloc(sizeof(struct Node));
+  struct Node* node = (struct Node*) malloc(sizeof(struct Node));
 
   /* set properties */
   node->type = type;
diff --git a/src/parser/parser.y b/src/parser/parser.y
index e6fcbff..a9d7313 100644
--- a/src/parser/parser.y
+++ b/src/parser/parser.y
@@ -44,7 +44,7 @@
 %token COMMENT            
 %token WHITESPACE   
 %token DONE
-%token <value> LAMBDA
+%token <value> LAMBDATAG
 %token COLON
 
 /* declare non-terminals */
@@ -101,9 +101,9 @@ statements: BEGINTOK substatements END { $$ = $2; }
 substatements: statement substatements {$$ = make_node(STATEMENT, NULL, ""); attach_node($$, $1); attach_node($$, $2); }
               | statement  {$$ = make_node(STATEMENT, NULL, ""); attach_node($$, $1); }
 
-exprlambda: LAMBDA ident COLON expression { 
+exprlambda: LAMBDATAG ident COLON expression { 
               // Only supports one argument functions for now
-              $$ = make_node(LAMBDA, NULL, "");
+              $$ = make_node(LAMBDATAG, NULL, "");
               attach_node($$, $2);
               attach_node($$, $4); }
         | expression { $$ = $1; }
diff --git a/src/variables/environment.c b/src/variables/environment.c
index db0411e..f89c0b3 100644
--- a/src/variables/environment.c
+++ b/src/variables/environment.c
@@ -5,7 +5,7 @@
 #include "variable.h"
 
 struct Environment* create_environment(void) {
-  struct Environment* env = malloc(sizeof(struct Environment));
+  struct Environment* env = (struct Environment*) malloc(sizeof(struct Environment));
   env->num_vars = 0;
   for(int i = 0; i < MAX_VARIABLES; i++) {
     env->vars[i] = NULL;
diff --git a/src/variables/value.c b/src/variables/value.c
index 383ff7e..b63c44e 100644
--- a/src/variables/value.c
+++ b/src/variables/value.c
@@ -6,7 +6,7 @@
 
 struct Value* make_value(int type, long num, double dec, struct Node* expr, char* str) {
     /* allocate space */
-  struct Value* val = malloc(sizeof(struct Value));
+  struct Value* val = (struct Value*) malloc(sizeof(struct Value));
 
   /* set properties */
   val->type = type;
diff --git a/src/variables/value.h b/src/variables/value.h
index eb63cbb..4167813 100644
--- a/src/variables/value.h
+++ b/src/variables/value.h
@@ -1,7 +1,7 @@
 #ifndef VALUE_H
 #define VALUE_H
 
-enum TypeTag { DOUBLE, LONG, BOOLEAN, STRING };
+enum TypeTag { DOUBLE, LONG, BOOLEAN, STRING, LAMBDA };
 
 typedef union typeval {
         long num;
diff --git a/src/variables/variable.c b/src/variables/variable.c
index 2ab5275..60a3951 100644
--- a/src/variables/variable.c
+++ b/src/variables/variable.c
@@ -6,7 +6,7 @@
 /* creates a new variable and returns it */
 struct Variable* make_variable(char* id, struct Value* value) {
   /* allocate space */
-  struct Variable* var = malloc(sizeof(struct Variable));
+  struct Variable* var = (struct Variable*) malloc(sizeof(struct Variable));
 
   /* set properties */
   strcpy(var->id, id);