diff --git a/src/ptr_map.cpp b/src/ptr_map.cpp
index 19ba37085..932f05d69 100644
--- a/src/ptr_map.cpp
+++ b/src/ptr_map.cpp
@@ -13,16 +13,22 @@ enum : MapIndex { MAP_SENTINEL = ~(MapIndex)0 };
 
 template <typename T>
 struct PtrMapConstant {
-	static constexpr void const *TOMBSTONE = reinterpret_cast<void *>(~(uintptr)0);
+	static gb_inline T const TOMBSTONE() {
+		return (T)reinterpret_cast<void *>(~(uintptr)0);
+	}
 };
 
 template <>
 struct PtrMapConstant<u64> {
-	static constexpr u64 TOMBSTONE = ~(u64)0;
+	static gb_inline u64 const TOMBSTONE() {
+		return ~(u64)0;
+	}
 };
 template <>
 struct PtrMapConstant<i64> {
-	static constexpr i64 TOMBSTONE = ~(i64)0;
+	static gb_inline i64 const TOMBSTONE() {
+		return ~(i64)0;
+	}
 };
 
 template <typename K, typename V>
@@ -113,7 +119,7 @@ gb_internal void map__insert(PtrMap<K, V> *h, K key, V const &value) {
 	MapIndex original_index = index;
 	do {
 		auto *entry = h->entries+index;
-		if (!entry->key || entry->key == PtrMapConstant<K>::TOMBSTONE) {
+		if (!entry->key || entry->key == PtrMapConstant<K>::TOMBSTONE()) {
 			entry->key   = key;
 			entry->value = value;
 			h->count += 1;
@@ -161,7 +167,7 @@ gb_internal void map_reserve(PtrMap<K, V> *h, isize cap) {
 		for (u32 i = 0; i < h->capacity; i++) {
 			auto *entry = h->entries+i;
 			if (entry->key &&
-			    entry->key != PtrMapConstant<K>::TOMBSTONE) {
+			    entry->key != PtrMapConstant<K>::TOMBSTONE()) {
 				map__insert(&new_h, entry->key, entry->value);
 			}
 		}
@@ -271,7 +277,7 @@ template <typename K, typename V>
 gb_internal void map_remove(PtrMap<K, V> *h, K key) {
 	MapIndex found_index = 0;
 	if (map_try_get(h, key, &found_index)) {
-		h->entries[found_index].key = cast(K)PtrMapConstant<K>::TOMBSTONE;
+		h->entries[found_index].key = cast(K)PtrMapConstant<K>::TOMBSTONE();
 		h->count -= 1;
 	}
 }
@@ -381,7 +387,7 @@ struct PtrMapIterator {
 				return *this;
 			}
 			PtrMapEntry<K, V> *entry = map->entries+index;
-			if (entry->key && entry->key != PtrMapConstant<K>::TOMBSTONE) {
+			if (entry->key && entry->key != PtrMapConstant<K>::TOMBSTONE()) {
 				return *this;
 			}
 		}
@@ -418,7 +424,7 @@ gb_internal PtrMapIterator<K, V> begin(PtrMap<K, V> &m) noexcept {
 	MapIndex index = 0;
 	while (index < m.capacity) {
 		auto key = m.entries[index].key;
-		if (key && key != PtrMapConstant<K>::TOMBSTONE) {
+		if (key && key != PtrMapConstant<K>::TOMBSTONE()) {
 			break;
 		}
 		index++;
@@ -434,7 +440,7 @@ gb_internal PtrMapIterator<K, V> const begin(PtrMap<K, V> const &m) noexcept {
 	MapIndex index = 0;
 	while (index < m.capacity) {
 		auto key = m.entries[index].key;
-		if (key && key != PtrMapConstant<K>::TOMBSTONE) {
+		if (key && key != PtrMapConstant<K>::TOMBSTONE()) {
 			break;
 		}
 		index++;