diff --git a/examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp b/examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
index 945b9706d4d..163caa6872d 100644
--- a/examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
+++ b/examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
@@ -1092,7 +1092,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
diff --git a/examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp b/examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
index 945b9706d4d..163caa6872d 100644
--- a/examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
+++ b/examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
@@ -1092,7 +1092,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
diff --git a/examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp b/examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
index 945b9706d4d..163caa6872d 100644
--- a/examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
+++ b/examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
@@ -1092,7 +1092,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
diff --git a/examples/Kaleidoscope/Chapter6/toy.cpp b/examples/Kaleidoscope/Chapter6/toy.cpp
index 1e0ddca29b6..0c222173558 100644
--- a/examples/Kaleidoscope/Chapter6/toy.cpp
+++ b/examples/Kaleidoscope/Chapter6/toy.cpp
@@ -932,7 +932,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
diff --git a/examples/Kaleidoscope/Chapter7/toy.cpp b/examples/Kaleidoscope/Chapter7/toy.cpp
index 2f8cb682a84..79ac7b33d7a 100644
--- a/examples/Kaleidoscope/Chapter7/toy.cpp
+++ b/examples/Kaleidoscope/Chapter7/toy.cpp
@@ -1099,7 +1099,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
diff --git a/examples/Kaleidoscope/Chapter8/toy.cpp b/examples/Kaleidoscope/Chapter8/toy.cpp
index cdf650973b8..3ed98fcfdb5 100644
--- a/examples/Kaleidoscope/Chapter8/toy.cpp
+++ b/examples/Kaleidoscope/Chapter8/toy.cpp
@@ -1097,7 +1097,7 @@ Function *FunctionAST::codegen() {
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }