diff --git a/src/admin.c b/src/admin.c
index c1b94ccc..cc1f44ab 100644
--- a/src/admin.c
+++ b/src/admin.c
@@ -375,6 +375,12 @@ master_key(char* password, bool generate_pwd, int pwd_length)
    memset(&buf, 0, sizeof(buf));
    snprintf(&buf[0], sizeof(buf), "%s/.pgagroal/master.key", pgagroal_get_home_directory());
 
+   if (pgagroal_exists(&buf[0]))
+   {
+      warnx("The file ~/.pgexporter/master.key already exists");
+      goto error;
+   }
+
    if (stat(&buf[0], &st) == -1)
    {
       /* Ok */
diff --git a/src/include/utils.h b/src/include/utils.h
index 7c377186..3a2b10b5 100644
--- a/src/include/utils.h
+++ b/src/include/utils.h
@@ -275,6 +275,14 @@ pgagroal_get_user_name(void);
 char*
 pgagroal_get_password(void);
 
+/**
+ * File/directory exists
+ * @param f The file/directory
+ * @return The result
+ */
+bool
+pgagroal_exists(char* f);
+
 /**
  * BASE64 encode a string
  * @param raw The string
diff --git a/src/libpgagroal/utils.c b/src/libpgagroal/utils.c
index 040ad2d4..e7036668 100644
--- a/src/libpgagroal/utils.c
+++ b/src/libpgagroal/utils.c
@@ -621,6 +621,17 @@ pgagroal_get_password(void)
    return result;
 }
 
+bool
+pgagroal_exists(char* f)
+{
+   if (access(f, F_OK) == 0)
+   {
+      return true;
+   }
+
+   return false;
+}
+
 int
 pgagroal_base64_encode(char* raw, int raw_length, char** encoded)
 {