diff --git a/gcc/config/i386/pmm_malloc.h b/gcc/config/i386/pmm_malloc.h
index 87344d9383f..ece428df487 100644
--- a/gcc/config/i386/pmm_malloc.h
+++ b/gcc/config/i386/pmm_malloc.h
@@ -27,12 +27,13 @@
 #include <stdlib.h>
 
 /* We can't depend on <stdlib.h> since the prototype of posix_memalign
-   may not be visible.  */
+   may not be visible and we can't pollute the namespace either.  */
 #ifndef __cplusplus
-extern int posix_memalign (void **, size_t, size_t);
+extern int _mm_posix_memalign (void **, size_t, size_t)
 #else
-extern "C" int posix_memalign (void **, size_t, size_t) throw ();
+extern "C" int _mm_posix_memalign (void **, size_t, size_t) throw ()
 #endif
+__asm__("posix_memalign");
 
 static __inline void *
 _mm_malloc (size_t __size, size_t __alignment)
@@ -42,7 +43,7 @@ _mm_malloc (size_t __size, size_t __alignment)
     return malloc (__size);
   if (__alignment == 2 || (sizeof (void *) == 8 && __alignment == 4))
     __alignment = sizeof (void *);
-  if (posix_memalign (&__ptr, __alignment, __size) == 0)
+  if (_mm_posix_memalign (&__ptr, __alignment, __size) == 0)
     return __ptr;
   else
     return NULL;