diff --git a/cmake/cmake.h.in b/cmake/cmake.h.in
index 06f26176..ed44b2ca 100644
--- a/cmake/cmake.h.in
+++ b/cmake/cmake.h.in
@@ -28,6 +28,7 @@
 #cmakedefine01 HAVE_POSIX_OPENPT
 #cmakedefine01 HAVE_PTSNAME
 #cmakedefine01 HAVE_SETRESUID
+#cmakedefine01 HAVE_SETRESGID
 #cmakedefine01 HAVE_STRSIGNAL
 #cmakedefine01 HAVE_UPDWTMPX
 #cmakedefine01 HAVE_FSTATAT