diff --git a/include/llvm-dialects/Dialect/Dialect.td b/include/llvm-dialects/Dialect/Dialect.td
index 7d51932..0d0a7e7 100644
--- a/include/llvm-dialects/Dialect/Dialect.td
+++ b/include/llvm-dialects/Dialect/Dialect.td
@@ -296,7 +296,7 @@ def : AttrLlvmType<AttrI32, I32>;
 def : AttrLlvmType<AttrI64, I64>;
 
 def ImmutableStringAttr : Attr<"::llvm::StringRef"> {
-  let toLlvmValue = [{ $_builder.CreateGlobalString($0, "str") }];
+  let toLlvmValue = [{ $_builder.CreateGlobalString($0, "str", 0, nullptr, /* AddNull */ false) }];
   let fromLlvmValue = [{ ::llvm::cast<::llvm::ConstantDataArray>(::llvm::cast<::llvm::GlobalVariable>($0)->getInitializer())->getAsString() }];
   let isImmutable = true;
 }
diff --git a/test/example/generated/ExampleDialect.cpp.inc b/test/example/generated/ExampleDialect.cpp.inc
index 3b2b8fd..4c9fbe5 100644
--- a/test/example/generated/ExampleDialect.cpp.inc
+++ b/test/example/generated/ExampleDialect.cpp.inc
@@ -2543,7 +2543,7 @@ initial
 
   
 ::llvm::SmallVector<::llvm::Value*, 1> args = {
- b.CreateGlobalString(val, "str") 
+ b.CreateGlobalString(val, "str", 0, nullptr, /* AddNull */ false) 
       };
       
       return ::llvm::cast<StringAttrOp>(b.CreateCall(fn, args, instName));
diff --git a/test/example/test-builder.test b/test/example/test-builder.test
index 5f88cc3..6ef0735 100644
--- a/test/example/test-builder.test
+++ b/test/example/test-builder.test
@@ -22,7 +22,7 @@
 ; RUN: llvm-dialects-example - | FileCheck --check-prefixes=CHECK %s
 
 ;.
-; CHECK: @str = private unnamed_addr constant [13 x i8] c"Hello world!\00", align 1
+; CHECK: @str = private unnamed_addr constant [12 x i8] c"Hello world!", align 1
 ;.
 ; CHECK-LABEL: define void @example() {
 ; CHECK-NEXT:  [[ENTRY:.*:]]
diff --git a/test/example/visitor-basic.ll b/test/example/visitor-basic.ll
index 7d92fad..091d73b 100644
--- a/test/example/visitor-basic.ll
+++ b/test/example/visitor-basic.ll
@@ -43,7 +43,7 @@
 ; DEFAULT-NEXT: visiting ReturnInst: ret void
 ; DEFAULT-NEXT: inner.counter = 1
 
-@0 = private unnamed_addr constant [13 x i8] c"Hello world!\00", align 1
+@0 = private unnamed_addr constant [12 x i8] c"Hello world!", align 1
 
 define void @test1(ptr %p) {
 entry: