diff --git a/src/core/fiber.c b/src/core/fiber.c
index 84bb8f8c..d4fa5e82 100644
--- a/src/core/fiber.c
+++ b/src/core/fiber.c
@@ -202,7 +202,7 @@ static void janet_env_detach(JanetFuncEnv *env) {
     if (env) {
         size_t s = sizeof(Janet) * env->length;
         Janet *vmem = malloc(s);
-        janet_vm_next_collection += s;
+        janet_vm_next_collection += (uint32_t) s;
         if (NULL == vmem) {
             JANET_OUT_OF_MEMORY;
         }
diff --git a/src/core/typedarray.c b/src/core/typedarray.c
index dc4ab824..10dc1370 100644
--- a/src/core/typedarray.c
+++ b/src/core/typedarray.c
@@ -159,7 +159,7 @@ static void ta_view_unmarshal(void *p, JanetMarshalContext *ctx) {
     view->as.u8 = view->buffer->data + offset;
 }
 
-static JanetMethod tarray_view_methods[];
+static JanetMethod tarray_view_methods[6];
 
 static Janet ta_getter(void *p, Janet key) {
     Janet value;