--- snes9x-1.51-src-orig/configure.in	2009-12-07 19:22:46 +0900
+++ snes9x-1.51-src/configure.in	2009-12-07 19:24:43 +0900
@@ -21,8 +21,8 @@
 SYSDEFINES=''
 
 AC_DEFUN([AC_S9X_DEFINE],
-  AC_DEFINE($1, $2, $3)
-  SYSDEFINES="$SYSDEFINES"' -D$1')
+  [AC_DEFINE($1, $2, $3)
+  SYSDEFINES="$SYSDEFINES"' -D$1'])
 
 AC_DEFUN([AC_SYS_COMPILER_FLAG],
 [