diff --git a/src/shrpx_ssl.cc b/src/shrpx_ssl.cc
index b3cf2537..0a7ca6ac 100644
--- a/src/shrpx_ssl.cc
+++ b/src/shrpx_ssl.cc
@@ -808,8 +808,8 @@ bool tls_hostname_match(const char *pattern, const char *hostname) {
     return false;
   }
   return util::istarts_with(hostname, hnLeftLabelEnd, pattern, ptWildcard) &&
-         util::iendsWith(hostname, hnLeftLabelEnd, ptWildcard + 1,
-                         ptLeftLabelEnd);
+         util::iends_with(hostname, hnLeftLabelEnd, ptWildcard + 1,
+                          ptLeftLabelEnd);
 }
 } // namespace
 
diff --git a/src/util.cc b/src/util.cc
index 5d884b3c..2962e152 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -521,8 +521,8 @@ void show_candidates(const char *unkopt, option *options) {
     }
     // Use cost 0 for suffix match, but match at least 3 characters
     if (unkoptlen >= 3 &&
-        iendsWith(options[i].name, options[i].name + optnamelen, unkopt,
-                  unkopt + unkoptlen)) {
+        iends_with(options[i].name, options[i].name + optnamelen, unkopt,
+                   unkopt + unkoptlen)) {
       cands.emplace_back(0, options[i].name);
       continue;
     }
@@ -754,7 +754,7 @@ bool check_path(const std::string &path) {
          path.find('\\') == std::string::npos &&
          path.find("/../") == std::string::npos &&
          path.find("/./") == std::string::npos &&
-         !util::endsWith(path, "/..") && !util::endsWith(path, "/.");
+         !util::ends_with(path, "/..") && !util::ends_with(path, "/.");
 }
 
 int64_t to_time64(const timeval &tv) {
diff --git a/src/util.h b/src/util.h
index 7fcc7817..a4468bcb 100644
--- a/src/util.h
+++ b/src/util.h
@@ -212,29 +212,29 @@ bool istarts_with(InputIt a, size_t an, const char *b) {
 bool istarts_with(const char *a, const char *b);
 
 template <typename InputIterator1, typename InputIterator2>
-bool endsWith(InputIterator1 first1, InputIterator1 last1,
-              InputIterator2 first2, InputIterator2 last2) {
+bool ends_with(InputIterator1 first1, InputIterator1 last1,
+               InputIterator2 first2, InputIterator2 last2) {
   if (last1 - first1 < last2 - first2) {
     return false;
   }
   return std::equal(first2, last2, last1 - (last2 - first2));
 }
 
-inline bool endsWith(const std::string &a, const std::string &b) {
-  return endsWith(std::begin(a), std::end(a), std::begin(b), std::end(b));
+inline bool ends_with(const std::string &a, const std::string &b) {
+  return ends_with(std::begin(a), std::end(a), std::begin(b), std::end(b));
 }
 
 template <typename InputIterator1, typename InputIterator2>
-bool iendsWith(InputIterator1 first1, InputIterator1 last1,
-               InputIterator2 first2, InputIterator2 last2) {
+bool iends_with(InputIterator1 first1, InputIterator1 last1,
+                InputIterator2 first2, InputIterator2 last2) {
   if (last1 - first1 < last2 - first2) {
     return false;
   }
   return std::equal(first2, last2, last1 - (last2 - first2), CaseCmp());
 }
 
-inline bool iendsWith(const std::string &a, const std::string &b) {
-  return iendsWith(std::begin(a), std::end(a), std::begin(b), std::end(b));
+inline bool iends_with(const std::string &a, const std::string &b) {
+  return iends_with(std::begin(a), std::end(a), std::begin(b), std::end(b));
 }
 
 int strcompare(const char *a, const uint8_t *b, size_t n);
diff --git a/src/util_test.cc b/src/util_test.cc
index 19cdbf90..adc079f6 100644
--- a/src/util_test.cc
+++ b/src/util_test.cc
@@ -356,15 +356,15 @@ void test_util_starts_with(void) {
 }
 
 void test_util_ends_with(void) {
-  CU_ASSERT(util::endsWith("foo", "foo"));
-  CU_ASSERT(util::endsWith("foo", ""));
-  CU_ASSERT(util::endsWith("ofoo", "foo"));
-  CU_ASSERT(!util::endsWith("ofoo", "fo"));
+  CU_ASSERT(util::ends_with("foo", "foo"));
+  CU_ASSERT(util::ends_with("foo", ""));
+  CU_ASSERT(util::ends_with("ofoo", "foo"));
+  CU_ASSERT(!util::ends_with("ofoo", "fo"));
 
-  CU_ASSERT(util::iendsWith("fOo", "Foo"));
-  CU_ASSERT(util::iendsWith("foo", ""));
-  CU_ASSERT(util::iendsWith("oFoo", "fOO"));
-  CU_ASSERT(!util::iendsWith("ofoo", "fo"));
+  CU_ASSERT(util::iends_with("fOo", "Foo"));
+  CU_ASSERT(util::iends_with("foo", ""));
+  CU_ASSERT(util::iends_with("oFoo", "fOO"));
+  CU_ASSERT(!util::iends_with("ofoo", "fo"));
 }
 
 void test_util_parse_http_date(void) {