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-rw-r--r--indra/llprimitive/llmaterialid.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/indra/llprimitive/llmaterialid.h b/indra/llprimitive/llmaterialid.h
index a474703f79..ffefc9f11c 100644
--- a/indra/llprimitive/llmaterialid.h
+++ b/indra/llprimitive/llmaterialid.h
@@ -42,6 +42,7 @@ public:
bool operator == (const LLMaterialID& pOtherMaterialID) const;
bool operator != (const LLMaterialID& pOtherMaterialID) const;
LLMaterialID& operator = (const LLMaterialID& pOtherMaterialID);
+ bool operator < (const LLMaterialID& pOtherMaterialID) const;
bool isNull() const;