diff --git a/src/vm/fzl_vm_extern.c b/src/vm/fzl_vm_extern.c
index 118cb04..4451da0 100644
--- a/src/vm/fzl_vm_extern.c
+++ b/src/vm/fzl_vm_extern.c
@@ -45,6 +45,12 @@ ffi_type *resolve_type(fzl_vm_reader_t *reader, fzl_extern_type_ref_t *ref)
       case FZL_TYPE_UINT64:
         return &ffi_type_uint64;
 
+      case FZL_TYPE_INT:
+        return &ffi_type_sint;
+
+      case FZL_TYPE_UINT:
+        return &ffi_type_uint;
+
       case FZL_TYPE_CHAR:
         return &ffi_type_schar;
 
diff --git a/src/vm/main.c b/src/vm/main.c
index 420f574..bb9efe1 100644
--- a/src/vm/main.c
+++ b/src/vm/main.c
@@ -145,7 +145,11 @@ int main(int argc, char **argv)
   if (!vm->prep_fns)
   {
     printf("%sError%s: %s\n", FZL_CERROR, FZL_CRST, fzl_vm_externs_geterror());
+
+    free(args);
     fzl_vm_free_externs(vm->prep_fns);
+    fzl_vm_freereader(reader);
+    fzl_freevm(vm);
     return -1;
   }
 
diff --git a/tests/programs/pos_math_lib.fzs b/tests/programs/pos_math_lib.fzs
index 6de647f..b8d7988 100644
--- a/tests/programs/pos_math_lib.fzs
+++ b/tests/programs/pos_math_lib.fzs
@@ -1,4 +1,4 @@
-extern "math" {
+extern "libmath" {
   fn double_num(int num) int;
 }