diff --git a/lib/src/atomic.h b/lib/src/atomic.h
index e8a2060a..d91c2c0b 100644
--- a/lib/src/atomic.h
+++ b/lib/src/atomic.h
@@ -1,6 +1,7 @@
 #ifndef TREE_SITTER_ATOMIC_H_
 #define TREE_SITTER_ATOMIC_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __TINYC__
@@ -46,11 +47,19 @@ static inline size_t atomic_load(const volatile size_t *p) {
 }
 
 static inline uint32_t atomic_inc(volatile uint32_t *p) {
-  return __sync_add_and_fetch(p, 1U);
+  #ifdef __ATOMIC_RELAXED
+    return __atomic_add_fetch(p, 1U, __ATOMIC_RELAXED);
+  #else
+    return __sync_add_and_fetch(p, 1U);
+  #endif
 }
 
 static inline uint32_t atomic_dec(volatile uint32_t *p) {
-  return __sync_sub_and_fetch(p, 1U);
+  #ifdef __ATOMIC_RELAXED
+    return __atomic_sub_fetch(p, 1U, __ATOMIC_RELAXED);
+  #else
+    return __sync_sub_and_fetch(p, 1U);
+  #endif
 }
 
 #endif