diff --git a/include/internal/cef_string_list.h b/include/internal/cef_string_list.h
index 0b6226bc7..e8339bdbc 100644
--- a/include/internal/cef_string_list.h
+++ b/include/internal/cef_string_list.h
@@ -41,7 +41,7 @@ extern "C" {
 ///
 /// CEF string maps are a set of key/value string pairs.
 ///
-typedef void* cef_string_list_t;
+typedef struct _cef_string_list_t* cef_string_list_t;
 
 ///
 /// Allocate a new string map.
diff --git a/include/internal/cef_string_map.h b/include/internal/cef_string_map.h
index f3a808356..40777c118 100644
--- a/include/internal/cef_string_map.h
+++ b/include/internal/cef_string_map.h
@@ -41,7 +41,7 @@ extern "C" {
 ///
 /// CEF string maps are a set of key/value string pairs.
 ///
-typedef void* cef_string_map_t;
+typedef struct _cef_string_map_t* cef_string_map_t;
 
 ///
 /// Allocate a new string map.
diff --git a/include/internal/cef_string_multimap.h b/include/internal/cef_string_multimap.h
index 313bd9dc7..9dde8053c 100644
--- a/include/internal/cef_string_multimap.h
+++ b/include/internal/cef_string_multimap.h
@@ -42,7 +42,7 @@ extern "C" {
 /// CEF string multimaps are a set of key/value string pairs.
 /// More than one value can be assigned to a single key.
 ///
-typedef void* cef_string_multimap_t;
+typedef struct _cef_string_multimap_t* cef_string_multimap_t;
 
 ///
 /// Allocate a new string multimap.
diff --git a/libcef/common/string_list_impl.cc b/libcef/common/string_list_impl.cc
index 02c956538..0b32ecf93 100644
--- a/libcef/common/string_list_impl.cc
+++ b/libcef/common/string_list_impl.cc
@@ -13,7 +13,7 @@ using StringList = std::vector<CefString>;
 }  // namespace
 
 CEF_EXPORT cef_string_list_t cef_string_list_alloc() {
-  return new StringList;
+  return reinterpret_cast<cef_string_list_t>(new StringList);
 }
 
 CEF_EXPORT size_t cef_string_list_size(cef_string_list_t list) {
@@ -58,5 +58,5 @@ CEF_EXPORT void cef_string_list_free(cef_string_list_t list) {
 CEF_EXPORT cef_string_list_t cef_string_list_copy(cef_string_list_t list) {
   DCHECK(list);
   StringList* impl = reinterpret_cast<StringList*>(list);
-  return new StringList(*impl);
+  return reinterpret_cast<cef_string_list_t>(new StringList(*impl));
 }
diff --git a/libcef/common/string_map_impl.cc b/libcef/common/string_map_impl.cc
index e95dbd09f..695e92745 100644
--- a/libcef/common/string_map_impl.cc
+++ b/libcef/common/string_map_impl.cc
@@ -13,7 +13,7 @@ using StringMap = std::map<CefString, CefString>;
 }  // namespace
 
 CEF_EXPORT cef_string_map_t cef_string_map_alloc() {
-  return new StringMap;
+  return reinterpret_cast<cef_string_map_t>(new StringMap);
 }
 
 CEF_EXPORT size_t cef_string_map_size(cef_string_map_t map) {
diff --git a/libcef/common/string_multimap_impl.cc b/libcef/common/string_multimap_impl.cc
index 24ff2307e..f35cdd8cf 100644
--- a/libcef/common/string_multimap_impl.cc
+++ b/libcef/common/string_multimap_impl.cc
@@ -13,7 +13,7 @@ using StringMultimap = std::multimap<CefString, CefString>;
 }  // namespace
 
 CEF_EXPORT cef_string_multimap_t cef_string_multimap_alloc() {
-  return new StringMultimap;
+  return reinterpret_cast<cef_string_multimap_t>(new StringMultimap);
 }
 
 CEF_EXPORT size_t cef_string_multimap_size(cef_string_multimap_t map) {