diff --git a/configure.ng b/configure.ng
index bd40694f..34094a48 100644
--- a/configure.ng
+++ b/configure.ng
@@ -221,8 +221,8 @@ AC_CHECK_FUNCS([ \
 # Optional functions
 AC_CHECK_FUNCS_ONCE([
 	arc4random arc4random_stir gai_strerror getnameinfo inet_aton \
-	sigaction sigprocmask snprintf vsnprintf strdup strndup strlcpy strlcat \
-	strtok_r unsetenv waitpid])
+	setgroups sigaction sigprocmask snprintf strdup strlcat strlcpy \
+	strndup strtok_r unsetenv vsnprintf waitpid])
 
 WORKING_GETADDRINFO
 
diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c
index 1b20597d..0e8acb54 100644
--- a/src/ngircd/ngircd.c
+++ b/src/ngircd/ngircd.c
@@ -724,6 +724,7 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
 			if (real_errno != EPERM) 
 				goto out;
 		}
+#ifdef HAVE_SETGROUPS
 		if (setgroups(0, NULL) != 0) {
 			real_errno = errno;
 			Log(LOG_ERR, "Can't drop supplementary group IDs: %s!",
@@ -731,6 +732,10 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
 			if (real_errno != EPERM)
 				goto out;
 		}
+#else
+		Log(LOG_WARNING,
+		    "Can't drop supplementary group IDs: setgroups(3) missing!");
+#endif
 	}
 #endif