diff --git a/configure.in b/configure.in
index a58f71e22c25ca4bd4a011debc16f684eac5836a..18fe2a6ce87472311d860131c759db8f557f1189 100644
--- a/configure.in
+++ b/configure.in
@@ -2428,7 +2428,7 @@ then
   sql_client_dirs="libmysql_r $sql_client_dirs"
   linked_client_targets="$linked_client_targets linked_libmysql_r_sources"
   AC_CONFIG_FILES(libmysql_r/Makefile)
-  AC_DEFINE([THREAD_SAFE_CLIENT], [1], [Should be client be thread safe])
+  AC_DEFINE([THREAD_SAFE_CLIENT], [1], [Should the client be thread safe])
 fi
 
 CLIENT_LIBS="$NON_THREADED_LIBS $openssl_libs $ZLIB_LIBS $STATIC_NSS_FLAGS"