diff --git a/file.c b/file.c
index fb05ce9b36..7be019f863 100644
--- a/file.c
+++ b/file.c
@@ -1008,3 +1008,18 @@ void fill_pathname_dir(char *in_dir, const char *in_basename, const char *replac
    ssnes_assert(strlcat(in_dir, base, size) < size);
    ssnes_assert(strlcat(in_dir, replace, size) < size);
 }
+
+void fill_pathname_base(char *out_dir, const char *in_path, size_t size)
+{
+   const char *ptr = strrchr(in_path, '/');
+   if (!ptr)
+      ptr = strrchr(in_path, '\\');
+
+   if (ptr)
+      ptr++;
+   else
+      ptr = in_path;
+
+   ssnes_assert(strlcpy(out_dir, ptr, size) < size);
+}
+
diff --git a/file.h b/file.h
index ba8cf8afbd..c65b12337d 100644
--- a/file.h
+++ b/file.h
@@ -71,4 +71,7 @@ void fill_pathname_noext(char *out_path, const char *in_path, const char *replac
 //    in_dir = "/tmp/some_dir/foo.c.asm"
 void fill_pathname_dir(char *in_dir, const char *in_basename, const char *replace, size_t size);
 
+// Copies basename of in_path into out_path.
+void fill_pathname_base(char *out_path, const char *in_path, size_t size);
+
 #endif