diff --git a/mlir/lib/Dialect/Arithmetic/IR/ArithmeticOps.cpp b/mlir/lib/Dialect/Arithmetic/IR/ArithmeticOps.cpp
--- a/mlir/lib/Dialect/Arithmetic/IR/ArithmeticOps.cpp
+++ b/mlir/lib/Dialect/Arithmetic/IR/ArithmeticOps.cpp
@@ -94,10 +94,10 @@
     if (intType && intType.getWidth() == 1)
       return setNameFn(getResult(), (intCst.getInt() ? "true" : "false"));
 
-    // Otherwise, build a compex name with the value and type.
+    // Otherwise, build a complex name with the value and type.
     SmallString<32> specialNameBuffer;
     llvm::raw_svector_ostream specialName(specialNameBuffer);
-    specialName << 'c' << intCst.getInt();
+    specialName << 'c' << intCst.getValue();
     if (intType)
       specialName << '_' << type;
     setNameFn(getResult(), specialName.str());
diff --git a/mlir/test/Dialect/Arithmetic/ops.mlir b/mlir/test/Dialect/Arithmetic/ops.mlir
--- a/mlir/test/Dialect/Arithmetic/ops.mlir
+++ b/mlir/test/Dialect/Arithmetic/ops.mlir
@@ -924,6 +924,12 @@
   // CHECK: %false = arith.constant false
   %8 = arith.constant false
 
+  // CHECK: %c-1_i128 = arith.constant -1 : i128
+  %9 = arith.constant 340282366920938463463374607431768211455 : i128
+
+  // CHECK: %c85070591730234615865843651857942052864_i128 = arith.constant 85070591730234615865843651857942052864 : i128
+  %10 = arith.constant 85070591730234615865843651857942052864 : i128
+
   return
 }