1 files changed, 1 insertions, 0 deletions
diff --git a/source/slang/slang-check-conformance.cpp b/source/slang/slang-check-conformance.cpp
index cf362dcdd..2c9977082 100644
--- a/source/slang/slang-check-conformance.cpp
+++ b/source/slang/slang-check-conformance.cpp
@@ -353,6 +353,7 @@ namespace Slang
 
                 for( auto constraintDeclRef : getMembersOfType<GenericTypeConstraintDecl>(genericDeclRef) )
                 {
+                    ensureDecl(constraintDeclRef, DeclCheckState::CanUseBaseOfInheritanceDecl);
                     auto sub = getSub(m_astBuilder, constraintDeclRef);
                     auto sup = getSup(m_astBuilder, constraintDeclRef);