diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -86,6 +86,7 @@
     libc.src.stdlib.malloc
     libc.src.stdlib.calloc
     libc.src.stdlib.realloc
+    libc.src.stdlib.aligned_alloc
     libc.src.stdlib.free
 
     # sys/mman.h entrypoints
diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td
--- a/libc/spec/stdc.td
+++ b/libc/spec/stdc.td
@@ -536,6 +536,7 @@
           FunctionSpec<"malloc", RetValSpec<VoidPtr>, [ArgSpec<SizeTType>]>,
           FunctionSpec<"calloc", RetValSpec<VoidPtr>, [ArgSpec<SizeTType>, ArgSpec<SizeTType>]>,
           FunctionSpec<"realloc", RetValSpec<VoidPtr>, [ArgSpec<VoidPtr>, ArgSpec<SizeTType>]>,
+          FunctionSpec<"aligned_alloc", RetValSpec<VoidPtr>, [ArgSpec<SizeTType>, ArgSpec<SizeTType>]>,
           FunctionSpec<"free", RetValSpec<VoidType>, [ArgSpec<VoidPtr>]>,
 
           FunctionSpec<"_Exit", RetValSpec<NoReturn>, [ArgSpec<IntType>]>,
diff --git a/libc/src/stdlib/CMakeLists.txt b/libc/src/stdlib/CMakeLists.txt
--- a/libc/src/stdlib/CMakeLists.txt
+++ b/libc/src/stdlib/CMakeLists.txt
@@ -234,6 +234,11 @@
     DEPENDS
       ${SCUDO_DEPS}
   )
+  add_entrypoint_external(
+    aligned_alloc
+    DEPENDS
+      ${SCUDO_DEPS}
+  )
   add_entrypoint_external(
     free
     DEPENDS
@@ -249,6 +254,9 @@
   add_entrypoint_external(
     realloc
   )
+  add_entrypoint_external(
+    aligned_alloc
+  )
   add_entrypoint_external(
     free
   )
diff --git a/libc/test/integration/scudo/CMakeLists.txt b/libc/test/integration/scudo/CMakeLists.txt
--- a/libc/test/integration/scudo/CMakeLists.txt
+++ b/libc/test/integration/scudo/CMakeLists.txt
@@ -15,6 +15,7 @@
     libc.src.stdlib.malloc
     libc.src.stdlib.calloc
     libc.src.stdlib.realloc
+    libc.src.stdlib.aligned_alloc
     libc.src.stdlib.free
 )