diff --git a/njvm.c b/njvm.c
index efd6625..ae32165 100644
--- a/njvm.c
+++ b/njvm.c
@@ -167,12 +167,18 @@ void execute(struct program program) {
                 if (debug == 1) printf("new i: %i\n", i);
                 break;
             case CALL:
-                push(stack, i+1);
-              break;  
+                if (debug == 1) printf("call: %i\n", SIGN_EXTEND(IMMEDIATE(program.program[i])));
+                push(stack, i + 1);
+                i = SIGN_EXTEND(IMMEDIATE(program.program[i])) - 1;
+                if (debug == 1) printf("new i: %i\n", i);
+                break;
             case RET:
-               i = pop(stack);
-              break;
-      }
+                if (debug == 1) printf("ret\n");
+                if (debug == 1) printf("pop: %i\n", peek(stack, 1));
+                i = pop(stack);
+                if (debug == 1) printf("new i: %i\n", i);
+                break;
+        }
     }
     end:
     return;
diff --git a/program.c b/program.c
index d5491c4..4fcdbe5 100644
--- a/program.c
+++ b/program.c
@@ -104,6 +104,24 @@ void printProgram(struct program program) {
             case BRT:
                 strcpy(c, "brt");
                 break;
+            case CALL:
+                strcpy(c, "call");
+                break;
+            case RET:
+                strcpy(c, "ret");
+                break;
+            case DROP:
+                strcpy(c, "drop");
+                break;
+            case PUSHR:
+                strcpy(c, "pushr");
+                break;
+            case POPR:
+                strcpy(c, "popr");
+                break;
+            case DUP:
+                strcpy(c, "dup");
+                break;
             default:
                 strcpy(c, "ERROR");
                 break;