diff --git a/nimsuggest/nimsuggest.nim b/nimsuggest/nimsuggest.nim
index a8e43e8472..9cba9cc00f 100644
--- a/nimsuggest/nimsuggest.nim
+++ b/nimsuggest/nimsuggest.nim
@@ -825,6 +825,7 @@ func deduplicateSymInfoPair(xs: SuggestFileSymbolDatabase): SuggestFileSymbolDat
     isDecl: newPackedBoolArray(),
     caughtExceptions: newSeqOfCap[seq[PType]](xs.caughtExceptions.len),
     caughtExceptionsSet: newPackedBoolArray(),
+    isGenericInstance: newPackedBoolArray(),
     fileIndex: xs.fileIndex,
     trackCaughtExceptions: xs.trackCaughtExceptions,
     isSorted: false