--- firebird.org/configure	2015-03-27 16:00:42.000000000 +0200
+++ firebird/configure	2015-06-09 15:33:26.000000000 +0300
@@ -2373,7 +2373,7 @@
     ;;
 
   i*86-*-darwin* | i*86_*-darwin*)
-    MAKEFILE_PREFIX=darwin_i386
+    MAKEFILE_PREFIX=darwin_x86_64
     MAKEFILE_POSTFIX=darwin
     PLATFORM=DARWIN
     INSTALL_PREFIX=darwin
@@ -2386,7 +2386,7 @@
     EDITLINE_FLG=Y
     SHRLIB_EXT=dylib
     ICU_PLATFORM=MacOSX
-    CPU_TYPE=i386
+    CPU_TYPE=x86_64
     ;;
 
   powerpc-*-darwin*)