diff --git a/libc/bionic/system_properties.cpp b/libc/bionic/system_properties.cpp
index c57cd9c..b781ea3 100644
--- a/libc/bionic/system_properties.cpp
+++ b/libc/bionic/system_properties.cpp
@@ -304,7 +304,7 @@
 }
 
 void* prop_area::allocate_obj(const size_t size, uint_least32_t* const off) {
-  const size_t aligned = BIONIC_ALIGN(size, sizeof(uint_least32_t));
+  const size_t aligned = __BIONIC_ALIGN(size, sizeof(uint_least32_t));
   if (bytes_used_ + aligned > pa_data_size) {
     return nullptr;
   }