diff --git a/src/book.cpp b/src/book.cpp
index bd1eba6..a5e2f5f 100644
--- a/src/book.cpp
+++ b/src/book.cpp
@@ -295,8 +295,8 @@ std::vector<string> list_spine(const fs::path &filepath)
             << format(translate("{0:s} is damaged. Could not read spine. "
                                 "Skipping file.\n")
                           .str()
-                          .data(),
-                      filepath);
+                          .c_str(),
+                      filepath.c_str());
         return {};
     }
 
diff --git a/src/output.cpp b/src/output.cpp
index 288bfcc..dadb3f6 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -45,7 +45,7 @@ void print_matches(const std::vector<search::match> &matches,
             cout << termcolor::yellow;
         }
         cout << format(translate("  In {0:s}: \n").str().c_str(),
-                       fs::relative(matches[0].filepath_epub));
+                       fs::relative(matches[0].filepath_epub).c_str());
         if (!opts.nocolor)
         {
             cout << termcolor::reset;