diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
index 9aabc18565db..b1932866a8c4 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_parser.c
@@ -100,7 +100,9 @@
 #include <setjmp.h>
 #include <strings.h>
 #include <assert.h>
+#if defined(sun)
 #include <alloca.h>
+#endif
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>