diff --git a/var/spack/repos/builtin/packages/silo/package.py b/var/spack/repos/builtin/packages/silo/package.py
index 04427ae5f29..6c75493faa2 100644
--- a/var/spack/repos/builtin/packages/silo/package.py
+++ b/var/spack/repos/builtin/packages/silo/package.py
@@ -109,6 +109,9 @@ def flag_handler(self, name, flags):
             elif name == "fcflags":
                 flags.append(self.compiler.fc_pic_flag)
         if name == "cflags" or name == "cxxflags":
+            if spec.satisfies("%oneapi"):
+                flags.append("-Wno-error=int")
+                flags.append("-Wno-error=int-conversion")
             if "+hdf5" in spec:
                 # @:4.10 can use up to the 1.10 API
                 if "@:4.10" in spec: