diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index ebdfc45..e09367d 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -159,7 +159,7 @@ typedef union { GLfloat f; GLint i; } fi_type;
  ***/
 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
     defined(__s390x__) || defined(__powerpc__) || \
-    defined(__amd64__) || \
+    defined(__amd64__) || defined(__x86_64__) \
     defined(ia64) || defined(__ia64__) || \
     defined(__hppa__) || defined(hpux) || \
     defined(__mips) || defined(_MIPS_ARCH) || \