diff --git a/configure.ac b/configure.ac
index 391cdb3..58f9319 100755
--- a/configure.ac
+++ b/configure.ac
@@ -776,7 +776,7 @@
 AC_CONFIG_HEADERS(config.h:config.hin)
 AC_CONFIG_HEADERS(lib/cpp/src/thrift/config.h:config.hin)
 AC_CONFIG_HEADERS(lib/c_glib/src/thrift/config.h:config.hin)
-# gruard against pre defined config.h
+# guard against pre defined config.h
 AH_TOP([
 #ifndef CONFIG_H
 #define CONFIG_H