diff --git a/build/pkgs/4ti2/spkg-configure.m4 b/build/pkgs/4ti2/spkg-configure.m4
index 3501939c875..43b23b3de6a 100644
--- a/build/pkgs/4ti2/spkg-configure.m4
+++ b/build/pkgs/4ti2/spkg-configure.m4
@@ -2,10 +2,10 @@ SAGE_SPKG_CONFIGURE([4ti2], [
     SAGE_SPKG_DEPCHECK([gmp mpir glpk zlib], [
         dnl Debian installs these programs with an executable prefix "4ti2-"
         dnl but polymake and our own code do not handle this yet (Singular does).
-        m4_foreach([prog], [hilbert,markov,graver,zsolve,qsolve,rays,ppi,circuits,groebner],
+        m4_foreach([prog], [hilbert,markov,graver,zsolve,qsolve,rays,ppi,circuits,groebner], [
             AC_CHECK_PROGS([FOURTITWO_]m4_toupper(prog), prog)
             AS_VAR_IF([FOURTITWO_]m4_toupper(prog), [""], [sage_spkg_install_4ti2=yes])
-        )
+        ])
         dnl Adapted from https://github.com/latte-int/latte/blob/master/m4/4ti2-check.m4
         AC_MSG_CHECKING(for library 4ti2gmp)
         BACKUP_CXXFLAGS=${CXXFLAGS}