diff --git a/mz_os.c b/mz_os.c
index d8dcbf9f..e68e8bb7 100644
--- a/mz_os.c
+++ b/mz_os.c
@@ -46,7 +46,7 @@ int32_t mz_path_append_slash(char *path, int32_t max_path, char slash) {
     int32_t path_len = (int32_t)strlen(path);
     if ((path_len + 2) >= max_path)
         return MZ_BUF_ERROR;
-    if (path[path_len - 1] != '\\' && path[path_len - 1] != '/') {
+    if (!mz_os_is_dir_separator(path[path_len - 1])) {
         path[path_len] = slash;
         path[path_len + 1] = 0;
     }
@@ -56,7 +56,7 @@ int32_t mz_path_append_slash(char *path, int32_t max_path, char slash) {
 int32_t mz_path_remove_slash(char *path) {
     int32_t path_len = (int32_t)strlen(path);
     while (path_len > 0) {
-        if (path[path_len - 1] == '\\' || path[path_len - 1] == '/')
+        if (mz_os_is_dir_separator(path[path_len - 1]))
             path[path_len - 1] = 0;
         else
             break;
@@ -68,7 +68,7 @@ int32_t mz_path_remove_slash(char *path) {
 
 int32_t mz_path_has_slash(const char *path) {
     int32_t path_len = (int32_t)strlen(path);
-    if (path_len > 0 && path[path_len - 1] != '\\' && path[path_len - 1] != '/')
+    if (path_len > 0 && !mz_os_is_dir_separator(path[path_len - 1]))
         return MZ_EXIST_ERROR;
     return MZ_OK;
 }
@@ -77,7 +77,7 @@ int32_t mz_path_convert_slashes(char *path, char slash) {
     int32_t i = 0;
 
     for (i = 0; i < (int32_t)strlen(path); i += 1) {
-        if (path[i] == '\\' || path[i] == '/')
+        if (mz_os_is_dir_separator(path[i]))
             path[i] = slash;
     }
     return MZ_OK;
@@ -136,12 +136,12 @@ int32_t mz_path_resolve(const char *path, char *output, int32_t max_output) {
 
     while (*source != 0 && max_output > 1) {
         check = source;
-        if (*check == '\\' || *check == '/')
+        if (mz_os_is_dir_separator(*check))
             check += 1;
 
         if (source == path || target == output || check != source) {
             /* Skip double paths */
-            if (*check == '\\' || *check == '/') {
+            if (mz_os_is_dir_separator(*check)) {
                 source += 1;
                 continue;
             }
@@ -158,7 +158,7 @@ int32_t mz_path_resolve(const char *path, char *output, int32_t max_output) {
                     continue;
                 }
                 /* Remove . if not at end of string */
-                else if (*check == '\\' || *check == '/') {
+                else if (mz_os_is_dir_separator(*check)) {
                     source += (check - source);
                     /* Skip slash if at beginning of string */
                     if (target == output && *source != 0)
@@ -168,14 +168,14 @@ int32_t mz_path_resolve(const char *path, char *output, int32_t max_output) {
                 /* Go to parent directory .. */
                 else if (*check == '.') {
                     check += 1;
-                    if (*check == 0 || (*check == '\\' || *check == '/')) {
+                    if (*check == 0 || mz_os_is_dir_separator(*check)) {
                         source += (check - source);
 
                         /* Search backwards for previous slash or the start of the output string */
                         if (target != output) {
                             target -= 1;
                             do {
-                                if (target == output || *target == '\\' || *target == '/')
+                                if (target == output || mz_os_is_dir_separator(*target))
                                     break;
 
                                 target -= 1;
@@ -185,7 +185,7 @@ int32_t mz_path_resolve(const char *path, char *output, int32_t max_output) {
 
                         if ((target == output) && *source != 0)
                             source += 1;
-                        if ((*target == '\\' || *target == '/') && *source == 0)
+                        if (mz_os_is_dir_separator(*target) && *source == 0)
                             target += 1;
 
                         *target = 0;
@@ -219,7 +219,7 @@ int32_t mz_path_remove_filename(char *path) {
     path_ptr = path + strlen(path) - 1;
 
     while (path_ptr > path) {
-        if ((*path_ptr == '/') || (*path_ptr == '\\')) {
+        if (mz_os_is_dir_separator(*path_ptr)) {
             *path_ptr = 0;
             break;
         }
@@ -242,7 +242,7 @@ int32_t mz_path_remove_extension(char *path) {
     path_ptr = path + strlen(path) - 1;
 
     while (path_ptr > path) {
-        if ((*path_ptr == '/') || (*path_ptr == '\\'))
+        if (mz_os_is_dir_separator(*path_ptr))
             break;
         if (*path_ptr == '.') {
             *path_ptr = 0;
@@ -267,7 +267,7 @@ int32_t mz_path_get_filename(const char *path, const char **filename) {
     *filename = NULL;
 
     for (match = path; *match != 0; match += 1) {
-        if ((*match == '\\') || (*match == '/'))
+        if (mz_os_is_dir_separator(*match))
             *filename = match + 1;
     }
 
@@ -296,7 +296,7 @@ int32_t mz_dir_make(const char *path) {
     if (err != MZ_OK) {
         match = current_dir + 1;
         while (1) {
-            while (*match != 0 && *match != '\\' && *match != '/')
+            while (*match != 0 && !mz_os_is_dir_separator(*match))
                 match += 1;
             hold = *match;
             *match = 0;
diff --git a/mz_os.h b/mz_os.h
index 4db05507..5cc73a13 100644
--- a/mz_os.h
+++ b/mz_os.h
@@ -150,6 +150,9 @@ struct dirent *mz_os_read_dir(DIR *dir);
 int32_t mz_os_close_dir(DIR *dir);
 /* Closes a directory that has been opened for listing */
 
+int32_t mz_os_is_dir_separator(const char c);
+/* Checks to see if character is a directory separator */
+
 int32_t mz_os_is_dir(const char *path);
 /* Checks to see if path is a directory */
 
diff --git a/mz_os_posix.c b/mz_os_posix.c
index 6cbc434e..461e3afb 100644
--- a/mz_os_posix.c
+++ b/mz_os_posix.c
@@ -289,6 +289,10 @@ int32_t mz_os_close_dir(DIR *dir) {
     return MZ_OK;
 }
 
+int32_t mz_os_is_dir_separator(const char c) {
+    return c == '/';
+}
+
 int32_t mz_os_is_dir(const char *path) {
     struct stat path_stat;
 
diff --git a/mz_os_win32.c b/mz_os_win32.c
index b12d980f..63acb2b5 100644
--- a/mz_os_win32.c
+++ b/mz_os_win32.c
@@ -437,6 +437,10 @@ int32_t mz_os_close_dir(DIR *dir) {
     return MZ_OK;
 }
 
+int32_t mz_os_is_dir_separator(const char c) {
+    return c == '\\' || c == '/';
+}
+
 int32_t mz_os_is_dir(const char *path) {
     wchar_t *path_wide = NULL;
     uint32_t attribs = 0;
diff --git a/mz_zip_rw.c b/mz_zip_rw.c
index 7b7654ac..f3a33d55 100644
--- a/mz_zip_rw.c
+++ b/mz_zip_rw.c
@@ -654,11 +654,9 @@ int32_t mz_zip_reader_entry_save_file(void *handle, const char *path) {
     if (!reader->file_info || !path)
         return MZ_PARAM_ERROR;
 
-    /* Convert to forward slashes for unix which doesn't like backslashes */
     pathwfs = (char *)strdup(path);
     if (!pathwfs)
         return MZ_MEM_ERROR;
-    mz_path_convert_slashes(pathwfs, MZ_PATH_SLASH_UNIX);
 
     if (reader->entry_cb)
         reader->entry_cb(handle, reader->entry_userdata, reader->file_info, pathwfs);
diff --git a/test/fuzz/unzip_fuzzer_seed_corpus/dot_dot_backslash_name.zip b/test/fuzz/unzip_fuzzer_seed_corpus/dot_dot_backslash_name.zip
new file mode 100644
index 00000000..ad26efc3
Binary files /dev/null and b/test/fuzz/unzip_fuzzer_seed_corpus/dot_dot_backslash_name.zip differ