diff --git a/src/util.c b/src/util.c
index 47516a8f7..81a64c702 100644
--- a/src/util.c
+++ b/src/util.c
@@ -729,6 +729,7 @@ void git__qsort_r(
 #if defined(__MINGW32__) || defined(AMIGA) || \
 	defined(__OpenBSD__) || defined(__NetBSD__) || \
 	defined(__gnu_hurd__) || defined(__ANDROID_API__) || \
+	defined(__sun) || \
 	(__GLIBC__ == 2 && __GLIBC_MINOR__ < 8)
 	git__insertsort_r(els, nel, elsize, NULL, cmp, payload);
 #elif defined(GIT_WIN32)