diff --git a/src/epsimage.cpp b/src/epsimage.cpp
index 1358faea..9fcaeea6 100644
--- a/src/epsimage.cpp
+++ b/src/epsimage.cpp
@@ -105,6 +105,11 @@ namespace {
     // closing part of all valid XMP trailers
     const std::string xmpTrailerEnd = "?>";
 
+    bool startsWith(const std::string& s, const std::string& start)
+    {
+        return s.find(start) == 0;
+    }
+
     //! Write data into temp file, taking care of errors
     void writeTemp(BasicIo& tempIo, const byte* data, size_t size)
     {
diff --git a/src/makernote_int.cpp b/src/makernote_int.cpp
index 164b5bb8..cf8a0444 100644
--- a/src/makernote_int.cpp
+++ b/src/makernote_int.cpp
@@ -1219,16 +1219,18 @@ namespace Exiv2 {
         };
         return std::find(std::begin(models), std::end(models), getExifModel(pRoot)) != std::end(models) ? 0 : -1;
     }
+
     int sony2FpSelector(uint16_t /*tag*/, const byte* /*pData*/, uint32_t /*size*/, TiffComponent* const pRoot)
     {
         // Not valid for models beginning
         std::string model = getExifModel(pRoot);
         for (auto& m : { "SLT-", "HV", "ILCA-" }) {
-            if (Util::startsWith(model, m))
+            if (model.find(m) == 0)
                 return -1;
         }
         return 0;
     }
+
     int sonyMisc2bSelector(uint16_t /*tag*/, const byte* /*pData*/, uint32_t /*size*/, TiffComponent* const pRoot)
     {
         // From Exiftool: https://github.com/exiftool/exiftool/blob/master/lib/Image/ExifTool/Sony.pm
diff --git a/src/sonymn_int.cpp b/src/sonymn_int.cpp
index 0cc2f0bc..b168170d 100644
--- a/src/sonymn_int.cpp
+++ b/src/sonymn_int.cpp
@@ -905,7 +905,7 @@ namespace Exiv2 {
             // Ranges of models that do not support this tag
             std::string model = pos->toString();
             for (auto& m : { "DSC-", "Stellar" }) {
-                if (Util::startsWith(model, m)) {
+                if (model.find(m) == 0) {
                     os << N_("n/a");
                     return os;
                 }
diff --git a/src/utils.cpp b/src/utils.cpp
index 097954c8..20f05bbd 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -118,11 +118,4 @@ namespace Util {
             index++;
         }
     }
-
-    bool startsWith(const std::string& s, const std::string& start)
-    {
-        return s.find(start) == 0;
-    }
-
-
 }                                       // namespace Util
diff --git a/src/utils.hpp b/src/utils.hpp
index 22beeb57..3a23099a 100644
--- a/src/utils.hpp
+++ b/src/utils.hpp
@@ -77,15 +77,6 @@ namespace Util {
      */
     void replace(std::string& text, const std::string& searchText, const std::string& replaceText);
 
-    // TODO: When using C++20, replace with std::basic_string<CharT,Traits,Allocator>::starts_with()
-    //       (suggested in https://github.com/Exiv2/exiv2/pull/1777).
-    /*!
-      @brief Tests if \em start occurs at the beginning of \em s.
-             Returns true if found, else false.
-             When Exiv2 uses C++20, this will be replaced with
-             std::basic_string<CharT,Traits,Allocator>::starts_with().
-     */
-    bool startsWith(const std::string& s, const std::string& start);
 }                                       // namespace Util
 
 #endif                                  // #ifndef UTILS_HPP_
diff --git a/unitTests/test_utils.cpp b/unitTests/test_utils.cpp
index 530d5b1a..711176f5 100644
--- a/unitTests/test_utils.cpp
+++ b/unitTests/test_utils.cpp
@@ -70,22 +70,3 @@ TEST(suffix, returnsEmptyStringWithFilesWithoutExtension)
     ASSERT_EQ("", Util::suffix("/home/luis/file"));
     ASSERT_EQ("", Util::suffix("c:\\luis\\file"));
 }
-
-TEST(startsWith, returnsTrueWhenReferenceStringStartsWithSpecifiedString)
-{
-    ASSERT_TRUE(Util::startsWith("aabbccdd", "aab"));
-    ASSERT_TRUE(Util::startsWith("aabbccdd", "aa"));
-    ASSERT_TRUE(Util::startsWith("aabbccdd", "a"));
-}
-
-TEST(startsWith, returnsFalseWhenReferenceStringDoesNotStartWithSpecifiedString)
-{
-    ASSERT_FALSE(Util::startsWith("aabbccdd", "b"));
-    ASSERT_FALSE(Util::startsWith("aabbccdd", "ab"));
-    ASSERT_FALSE(Util::startsWith("aabbccdd", "aac"));
-}
-
-TEST(startsWith, returnsFalseWhenTargetStringIsLongerThanReference)
-{
-    ASSERT_FALSE(Util::startsWith("aabb", "aabbC"));
-}