diff --git a/libc/bionic/grp_pwd.cpp b/libc/bionic/grp_pwd.cpp
index 2823662..50fcbce 100644
--- a/libc/bionic/grp_pwd.cpp
+++ b/libc/bionic/grp_pwd.cpp
@@ -580,7 +580,7 @@
   ErrnoRestorer errno_restorer;
   *result = NULL;
   char* p = reinterpret_cast<char*>(
-      BIONIC_ALIGN(reinterpret_cast<uintptr_t>(buf), sizeof(uintptr_t)));
+      __BIONIC_ALIGN(reinterpret_cast<uintptr_t>(buf), sizeof(uintptr_t)));
   if (p + sizeof(group_state_t) > buf + buflen) {
     return ERANGE;
   }
diff --git a/libc/bionic/jemalloc_wrapper.cpp b/libc/bionic/jemalloc_wrapper.cpp
index 266b966..19081a4 100644
--- a/libc/bionic/jemalloc_wrapper.cpp
+++ b/libc/bionic/jemalloc_wrapper.cpp
@@ -23,7 +23,7 @@
 
 void* je_pvalloc(size_t bytes) {
   size_t pagesize = getpagesize();
-  size_t size = BIONIC_ALIGN(bytes, pagesize);
+  size_t size = __BIONIC_ALIGN(bytes, pagesize);
   if (size < bytes) {
     return NULL;
   }
diff --git a/libc/bionic/mmap.cpp b/libc/bionic/mmap.cpp
index 57a8cdf..3503319 100644
--- a/libc/bionic/mmap.cpp
+++ b/libc/bionic/mmap.cpp
@@ -48,7 +48,7 @@
   }
 
   // prevent allocations large enough for `end - start` to overflow
-  size_t rounded = BIONIC_ALIGN(size, PAGE_SIZE);
+  size_t rounded = __BIONIC_ALIGN(size, PAGE_SIZE);
   if (rounded < size || rounded > PTRDIFF_MAX) {
     errno = ENOMEM;
     return MAP_FAILED;
diff --git a/libc/bionic/mremap.cpp b/libc/bionic/mremap.cpp
index 6653d43..896ccef 100644
--- a/libc/bionic/mremap.cpp
+++ b/libc/bionic/mremap.cpp
@@ -38,7 +38,7 @@
 
 void* mremap(void* old_address, size_t old_size, size_t new_size, int flags, ...) {
   // prevent allocations large enough for `end - start` to overflow
-  size_t rounded = BIONIC_ALIGN(new_size, PAGE_SIZE);
+  size_t rounded = __BIONIC_ALIGN(new_size, PAGE_SIZE);
   if (rounded < new_size || rounded > PTRDIFF_MAX) {
     errno = ENOMEM;
     return MAP_FAILED;
diff --git a/libc/bionic/pthread_create.cpp b/libc/bionic/pthread_create.cpp
index 65ab92c..be0fd1b 100644
--- a/libc/bionic/pthread_create.cpp
+++ b/libc/bionic/pthread_create.cpp
@@ -172,8 +172,8 @@
     // Make sure the stack size and guard size are multiples of PAGE_SIZE.
     if (__builtin_add_overflow(attr->stack_size, attr->guard_size, &mmap_size)) return EAGAIN;
     if (__builtin_add_overflow(mmap_size, sizeof(pthread_internal_t), &mmap_size)) return EAGAIN;
-    mmap_size = BIONIC_ALIGN(mmap_size, PAGE_SIZE);
-    attr->guard_size = BIONIC_ALIGN(attr->guard_size, PAGE_SIZE);
+    mmap_size = __BIONIC_ALIGN(mmap_size, PAGE_SIZE);
+    attr->guard_size = __BIONIC_ALIGN(attr->guard_size, PAGE_SIZE);
     attr->stack_base = __create_thread_mapped_space(mmap_size, attr->guard_size);
     if (attr->stack_base == NULL) {
       return EAGAIN;
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;
   }