diff --git a/config.h.in b/config.h.in
index 6568eba..53e0af8 100644
--- a/config.h.in
+++ b/config.h.in
@@ -15,6 +15,9 @@
 /* 1 if have the `std::shared_ptr' class. */
 #undef HAVE_STD_SHARED_PTR
 
+/* Define to 1 if your C compiler doesn't accept -c and -o together. */
+#undef NO_MINUS_C_MINUS_O
+
 /* Define to the address where bug reports for this package should be sent. */
 #undef PACKAGE_BUGREPORT