diff --git a/src/mapleall/maple_ir/src/bin_func_import.cpp b/src/mapleall/maple_ir/src/bin_func_import.cpp
index ee225525467aabab881d117e21ea2c7a56ef801a..d290a3403832d19a21cf482276b341af623de1ca 100644
--- a/src/mapleall/maple_ir/src/bin_func_import.cpp
+++ b/src/mapleall/maple_ir/src/bin_func_import.cpp
@@ -763,6 +763,7 @@ BlockNode *BinaryMplImport::ImportBlockNode(MIRFunction *func) {
         s->SetThenPart(ImportBlockNode(func));
         if (hasElsePart) {
           s->SetElsePart(ImportBlockNode(func));
+          s->SetNumOpnds(kOperandNumTernary);
         }
         s->SetOpnd(ImportExpression(func), 0);
         stmt = s;