diff --git a/repos/spack_repo/builtin/packages/silo/package.py b/repos/spack_repo/builtin/packages/silo/package.py
index 801d6a8d588..f0ee682d094 100644
--- a/repos/spack_repo/builtin/packages/silo/package.py
+++ b/repos/spack_repo/builtin/packages/silo/package.py
@@ -167,6 +167,13 @@ class Silo(autotools.AutotoolsPackage, cmake.CMakePackage):
         default="cmake",
     )
 
+    # Fix issue with delimiter char in constant nameschemes
+    patch(
+        "https://github.com/llnl/Silo/commit/023ca72.patch?full_index=1",
+        sha256="8f349208f404a7230857f14a34f4eb69db58bb8fa245257209821186c48eeb22",
+        when="@4.12.0",
+    )
+
 
 class AutotoolsBuilder(autotools.AutotoolsBuilder):