diff --git a/configure.ac b/configure.ac
index 3708321..9e99746 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,7 +53,7 @@ AC_ARG_ENABLE([sqlite],
 		[enable/disable sqlite 2 support (default is disabled)])],
 	[], [ enable_sqlite=no ])
 
-if test "$enable_sqlite" == yes
+if test "$enable_sqlite" = yes
 then
         AC_CHECK_HEADERS([sqlite.h], , [AC_MSG_ERROR([[SQLite header not found; install libsqlite-dev and dependencies for SQLite 2 support]])])
 
@@ -62,7 +65,7 @@ AC_ARG_ENABLE([sqlite3],
 		[enable/disable sqlite3 support (default is enabled)])],
 	[], [ enable_sqlite3=yes ])
 
-if test "$enable_sqlite3" == yes
+if test "$enable_sqlite3" = yes
 then
         AC_CHECK_HEADERS([sqlite3.h], , [AC_MSG_ERROR([[SQLite header not found; install libsqlite3-dev and dependencies for SQLite 3 support]])])
 
@@ -100,7 +99,7 @@ AC_ARG_ENABLE([postgres],
 		[enable/disable Postgres support (default is disabled)])],
 	[], [ enable_postgres=no ])
 
-if test "$enable_mysql" == yes
+if test "$enable_mysql" = yes
 then
 	# Check for mysql.
 	# This is a bloody hack for fedora core
@@ -114,7 +113,7 @@ fi
 
 AM_CONDITIONAL([HAVE_LIBMYSQL], [test "$enable_mysql" != no ])
 
-if test "$enable_postgres" == yes
+if test "$enable_postgres" = yes
 then
         AC_CHECK_HEADERS([postgresql/libpq-fe.h], , [AC_MSG_ERROR([[postgres header not found; install libpq-dev and dependencies for Postgres support]])])