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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 563e7fec6..9dc187828 100644
--- a/configure.ac
+++ b/configure.ac
@@ -261,7 +261,7 @@ AC_CHECK_HEADERS(glpk.h, ,[gplk=false])
AC_CHECK_LIB([glpk],[glp_create_prob], , [gplk=false])
# GLPK must support atm MLP presolving, version >= 4.32
AC_CHECK_MEMBERS(glp_iocp.presolve, ,[gplk=false],[[#include <glpk.h>]])
-if test $gplk = false
+if test $gplk == false
then
AM_CONDITIONAL(HAVE_GLPK, [test x$gplk = xtrue])
AM_CONDITIONAL(HAVE_LIBGLPK, [test x$gplk != x$gplk])