diff --git a/photon/libc/sys/horizon/heap.c b/photon/libc/sys/horizon/heap.c
index de9c736..33a3fd4 100644
--- a/photon/libc/sys/horizon/heap.c
+++ b/photon/libc/sys/horizon/heap.c
@@ -29,16 +29,25 @@ void __crt_heap_init(size_t sz)
     mx_status_t status = mx_vmar_allocate(root_vmar,
             MX_VM_CAN_MAP_READ | MX_VM_CAN_MAP_WRITE | MX_VM_CAN_MAP_SPECIFIC,
             0, HEAP_REGION_SZ, &heap_vmar, &heap);
+    if (status != MX_OK) {
+        abort();
+    }
 
     status = mx_vmo_create(
             sz,
             MX_VM_CAN_MAP_READ | MX_VM_CAN_MAP_WRITE | MX_VM_CAN_MAP_SPECIFIC,
             &heap_vmo);
+    if (status != MX_OK) {
+        abort();
+    }
 
-    mx_vmar_map(heap_vmar,
+    status = mx_vmar_map(heap_vmar,
             MX_VM_PERM_READ | MX_VM_PERM_WRITE | MX_VM_SPECIFIC,
             0, heap_vmo, 0, sz,
             &heap);
+    if (status != MX_OK) {
+        abort();
+    }
 
     heap_sz = sz;
     heap_start = heap;