diff --git a/ocaml/opam/Portfile b/ocaml/opam/Portfile
index 5885fd7480e81..ce1b7dcbd10e3 100644
--- a/ocaml/opam/Portfile
+++ b/ocaml/opam/Portfile
@@ -26,6 +26,10 @@ checksums           rmd160  734abf1551d55f29b34a97e2bf64e7cd9cc9fd8b \
                     size    11704198
 
 depends_build       port:ocaml
+# Opam upgrade uses patch to update the package repository,
+# this can silently fail with macos patch when files are
+# deleted upstream.
+depends_lib         port:gpatch
 
 # This prevents configure from trying to use a program to fetch dependencies.
 # We don't need or want one.