diff --git a/toolsrc/include/vcpkg_Strings.h b/toolsrc/include/vcpkg_Strings.h
index 61f6fab61..c44ce2b99 100644
--- a/toolsrc/include/vcpkg_Strings.h
+++ b/toolsrc/include/vcpkg_Strings.h
@@ -65,6 +65,8 @@ namespace vcpkg::Strings
 
     std::string ascii_to_lowercase(const std::string& input);
 
+    bool case_insensitive_ascii_starts_with(const std::string& s, const std::string& pattern);
+
     template<class Container, class Transformer, class CharType>
     std::basic_string<CharType> join(const CharType* delimiter, const Container& v, Transformer transformer)
     {
diff --git a/toolsrc/src/vcpkg_Strings.cpp b/toolsrc/src/vcpkg_Strings.cpp
index 5ad951399..1bd96fc12 100644
--- a/toolsrc/src/vcpkg_Strings.cpp
+++ b/toolsrc/src/vcpkg_Strings.cpp
@@ -110,6 +110,11 @@ namespace vcpkg::Strings
         return output;
     }
 
+    bool case_insensitive_ascii_starts_with(const std::string& s, const std::string& pattern)
+    {
+        return _strnicmp(s.c_str(), pattern.c_str(), pattern.size()) == 0;
+    }
+
     void trim(std::string* s)
     {
         s->erase(std::find_if_not(s->rbegin(), s->rend(), details::isspace).base(), s->end());
@@ -136,8 +141,9 @@ namespace vcpkg::Strings
     std::vector<std::string> split(const std::string& s, const std::string& delimiter)
     {
         std::vector<std::string> output;
-        
-        if(delimiter.empty()){
+
+        if (delimiter.empty())
+        {
             output.push_back(s);
             return output;
         }