1 files changed, 2 insertions, 0 deletions
diff --git a/source/slang/slang-check-modifier.cpp b/source/slang/slang-check-modifier.cpp
index e91d2e45b..483ff0e18 100644
--- a/source/slang/slang-check-modifier.cpp
+++ b/source/slang/slang-check-modifier.cpp
@@ -929,6 +929,8 @@ namespace Slang
                 if (checkCapabilityName(arg, capName))
                 {
                     capabilityNames.add(capName);
+                    if(isInternalCapabilityName(capName))
+                        maybeDiagnose(getSink(), this->getOptionSet(), DiagnosticCategory::Capability, attr, Diagnostics::usingInternalCapabilityName, attr, capName);
                 }
             }
             requireCapAttr->capabilitySet = CapabilitySet(capabilityNames);