diff --git a/libc/bionic/malloc_debug_common.cpp b/libc/bionic/malloc_debug_common.cpp
index 6677c22..cbca160 100644
--- a/libc/bionic/malloc_debug_common.cpp
+++ b/libc/bionic/malloc_debug_common.cpp
@@ -61,9 +61,13 @@
   Malloc(malloc_usable_size),
   Malloc(memalign),
   Malloc(posix_memalign),
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   Malloc(pvalloc),
+#endif
   Malloc(realloc),
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   Malloc(valloc),
+#endif
 };
 
 // Selector of dispatch table to use for dispatching malloc calls.
@@ -258,17 +262,21 @@
   return __libc_malloc_dispatch->posix_memalign(memptr, alignment, size);
 }
 
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
 extern "C" void* pvalloc(size_t bytes) {
   return __libc_malloc_dispatch->pvalloc(bytes);
 }
+#endif
 
 extern "C" void* realloc(void* oldMem, size_t bytes) {
   return __libc_malloc_dispatch->realloc(oldMem, bytes);
 }
 
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
 extern "C" void* valloc(size_t bytes) {
   return __libc_malloc_dispatch->valloc(bytes);
 }
+#endif
 
 // We implement malloc debugging only in libc.so, so the code below
 // must be excluded if we compile this file for static libc.a
@@ -299,9 +307,13 @@
   InitMallocFunction<MallocDebugMallocUsableSize>(malloc_impl_handler, &table->malloc_usable_size, prefix, "malloc_usable_size");
   InitMallocFunction<MallocDebugMemalign>(malloc_impl_handler, &table->memalign, prefix, "memalign");
   InitMallocFunction<MallocDebugPosixMemalign>(malloc_impl_handler, &table->posix_memalign, prefix, "posix_memalign");
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   InitMallocFunction<MallocDebugPvalloc>(malloc_impl_handler, &table->pvalloc, prefix, "pvalloc");
+#endif
   InitMallocFunction<MallocDebugRealloc>(malloc_impl_handler, &table->realloc, prefix, "realloc");
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   InitMallocFunction<MallocDebugValloc>(malloc_impl_handler, &table->valloc, prefix, "valloc");
+#endif
 }
 
 // Initializes memory allocation framework once per process.
@@ -447,9 +459,14 @@
       (malloc_dispatch_table.malloc_usable_size == NULL) ||
       (malloc_dispatch_table.memalign == NULL) ||
       (malloc_dispatch_table.posix_memalign == NULL) ||
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
       (malloc_dispatch_table.pvalloc == NULL) ||
-      (malloc_dispatch_table.realloc == NULL) ||
-      (malloc_dispatch_table.valloc == NULL)) {
+#endif
+      (malloc_dispatch_table.realloc == NULL)
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
+      || (malloc_dispatch_table.valloc == NULL)
+#endif
+      ) {
     error_log("%s: some symbols for libc.debug.malloc level %d were not found (see above)",
               getprogname(), g_malloc_debug_level);
     dlclose(malloc_impl_handle);
diff --git a/libc/bionic/malloc_debug_common.h b/libc/bionic/malloc_debug_common.h
index 8052a17..a0f9972 100644
--- a/libc/bionic/malloc_debug_common.h
+++ b/libc/bionic/malloc_debug_common.h
@@ -61,6 +61,12 @@
 #define Malloc(function)  dl ## function
 #endif
 
+// valloc(3) and pvalloc(3) were removed from POSIX 2004. We do not include them
+// for LP64, but the symbols remain in LP32 for binary compatibility.
+#ifndef __LP64__
+#define HAVE_DEPRECATED_MALLOC_FUNCS 1
+#endif
+
 // =============================================================================
 // Structures
 // =============================================================================
@@ -90,9 +96,14 @@
 typedef size_t (*MallocDebugMallocUsableSize)(const void*);
 typedef void* (*MallocDebugMemalign)(size_t, size_t);
 typedef int (*MallocDebugPosixMemalign)(void**, size_t, size_t);
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
 typedef void* (*MallocDebugPvalloc)(size_t);
+#endif
 typedef void* (*MallocDebugRealloc)(void*, size_t);
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
 typedef void* (*MallocDebugValloc)(size_t);
+#endif
+
 struct MallocDebug {
   MallocDebugCalloc calloc;
   MallocDebugFree free;
@@ -101,9 +112,13 @@
   MallocDebugMallocUsableSize malloc_usable_size;
   MallocDebugMemalign memalign;
   MallocDebugPosixMemalign posix_memalign;
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   MallocDebugPvalloc pvalloc;
+#endif
   MallocDebugRealloc realloc;
+#if defined(HAVE_DEPRECATED_MALLOC_FUNCS)
   MallocDebugValloc valloc;
+#endif
 };
 
 typedef bool (*MallocDebugInit)(HashTable*);
diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index 9a4e324..e6ea276 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -35,9 +35,6 @@
 extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(2)));
 extern size_t malloc_usable_size(const void* p);
 
-extern void* valloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
-extern void* pvalloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
-
 #ifndef STRUCT_MALLINFO_DECLARED
 #define STRUCT_MALLINFO_DECLARED 1
 struct mallinfo {