diff --git a/cpp/ql/src/semmle/code/cpp/models/implementations/StdString.qll b/cpp/ql/src/semmle/code/cpp/models/implementations/StdString.qll
index e9630050f74..80fe85e9f13 100644
--- a/cpp/ql/src/semmle/code/cpp/models/implementations/StdString.qll
+++ b/cpp/ql/src/semmle/code/cpp/models/implementations/StdString.qll
@@ -3,8 +3,8 @@ import semmle.code.cpp.models.interfaces.Taint
 /**
  * The `std::basic_string` constructor(s).
  */
-class StringConstructor extends TaintFunction {
-  StringConstructor() { this.hasQualifiedName("std", "basic_string", "basic_string") }
+class StdStringConstructor extends TaintFunction {
+  StdStringConstructor() { this.hasQualifiedName("std", "basic_string", "basic_string") }
 
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from any constructor argument to return value
@@ -16,8 +16,8 @@ class StringConstructor extends TaintFunction {
 /**
  * The standard function `std::string.c_str`.
  */
-class StringCStr extends TaintFunction {
-  StringCStr() { this.hasQualifiedName("std", "basic_string", "c_str") }
+class StdStringCStr extends TaintFunction {
+  StdStringCStr() { this.hasQualifiedName("std", "basic_string", "c_str") }
 
   override predicate hasTaintFlow(FunctionInput input, FunctionOutput output) {
     // flow from string itself (qualifier) to return value