diff --git a/aerc.spec b/aerc.spec
index 41d016d..494ca2a 100644
--- a/aerc.spec
+++ b/aerc.spec
@@ -28,6 +28,7 @@ Source:         %{gourl}/archive/%{version}.tar.gz#/%{name}-%{version}.tar.gz
 BuildRequires:  desktop-file-utils
 # wrap and colorize filters are written in C
 BuildRequires:  gcc
+BuildRequires:  glibc-all-langpacks
 BuildRequires:  gnupg
 BuildRequires:  notmuch-devel
 BuildRequires:  scdoc
@@ -81,6 +82,7 @@ desktop-file-validate %{buildroot}/%{_datadir}/applications/aerc.desktop
 
 %if %{with check}
 %check
+LANG=en_US.UTF-8 ./filters/test.sh
 %gocheck
 %endif