configure: Fix checking if BUILD_IMAP_HIBERNATE is set

diff --git a/configure.ac b/configure.ac
index f1e739064f2e9356c02076dec6a700f12d5e1259..3d7bce0dd48d21d3f3db208b614e8e817492bab9 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -367,7 +367,7 @@ AS_CASE(
    [none],   [BUILD_IMAP_HIBERNATE=0],
    [kqueue], [BUILD_IMAP_HIBERNATE=0],
    [BUILD_IMAP_HIBERNATE=1])
-AS_IF([test "$BUILD_IMAP_HIBERNATE"=1],
+AS_IF([test "$BUILD_IMAP_HIBERNATE" = 1],
       AC_DEFINE(BUILD_IMAP_HIBERNATE,, [Build with imap hibernate]))
 AM_CONDITIONAL([BUILD_IMAP_HIBERNATE], [test "$BUILD_IMAP_HIBERNATE" = 1])