--- firebird.org/configure	2015-03-27 16:00:42.000000000 +0200
+++ firebird/configure 2015-06-09 15:33:26.000000000 +0300
@@ -2903,7 +2903,7 @@
     ;;
 
   i*86-*-darwin*)
-    MAKEFILE_PREFIX=darwin_i386
+    MAKEFILE_PREFIX=darwin_x86_64
     MAKEFILE_POSTFIX=darwin
     PLATFORM=DARWIN
     INSTALL_PREFIX=darwin
@@ -2913,7 +2913,7 @@
 	LIBS="$LIBS -framework CoreFoundation"
     EDITLINE_FLG=Y
     SHRLIB_EXT=dylib
-    CPU_TYPE=i386
+    CPU_TYPE=x86_64
     EXPORT_SYMBOLS_STYLE=darwin
     ;;