diff --git a/mksh.spec b/mksh.spec
index a659c45..30c266d 100644
--- a/mksh.spec
+++ b/mksh.spec
@@ -4,8 +4,8 @@
 
 Summary:          MirBSD enhanced version of the Korn Shell
 Name:             mksh
-Version:          54
-Release:          2%{?dist}
+Version:          55
+Release:          1%{?dist}
 # BSD (setmode.c), ISC (strlcpy.c), MirOS (the rest)
 License:          MirOS and ISC and BSD
 Group:            System Environment/Shells
@@ -70,6 +70,7 @@ CFLAGS="$RPM_OPT_FLAGS -DMKSH_DISABLE_EXPERIMENTAL" sh Build.sh -r
 CFLAGS="$RPM_OPT_FLAGS -DMKSH_DISABLE_EXPERIMENTAL" sh Build.sh -r -c lto
 %endif
 cp test.sh test_mksh.sh
+HAVE_PERSISTENT_HISTORY=0; export HAVE_PERSISTENT_HISTORY
 # Work around RHBZ #922974 on Fedora 19 and later
 %if 0%{?fedora} >= 19 || 0%{?rhel} >= 7
 CFLAGS="$RPM_OPT_FLAGS -DMKSH_DISABLE_EXPERIMENTAL" sh Build.sh -L -r
@@ -138,6 +139,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}/man1/lksh.1*
 
 %changelog
+* Thu Apr 13 2017 Robert Scheck <robert@fedoraproject.org> 55-1
+- Upgrade to 55
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 54-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
 
diff --git a/sources b/sources
index 483068d..682e809 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-be0a6fb93b4a5f927bcc1893bb6692f8  mksh-R54.tgz
+SHA512 (mksh-R55.tgz) = 8640b3a228228652d1d2725b2bc1de7915113c6eceb3fc5fde5936e5eeb8abaf9d7acebf261584220f31ebc71319d5bd8b9a08adf84c1775f3a718985bcd02d7