diff --git a/llvm/include/llvm/MC/MCSectionELF.h b/llvm/include/llvm/MC/MCSectionELF.h
index d43ffbd885c961..f09d30591a3cf6 100644
--- a/llvm/include/llvm/MC/MCSectionELF.h
+++ b/llvm/include/llvm/MC/MCSectionELF.h
@@ -62,6 +62,8 @@ class MCSectionELF final : public MCSection {
                   type == ELF::SHT_NOBITS, Begin),
         Type(type), Flags(flags), UniqueID(UniqueID), EntrySize(entrySize),
         Group(group, IsComdat), LinkedToSym(LinkedToSym) {
+    assert((!(Flags & ELF::SHF_GROUP) || Group.getPointer()) &&
+           "Group section without signature!");
     if (Group.getPointer())
       Group.getPointer()->setIsSignature();
   }