diff --git a/include/polarssl/version.h b/include/polarssl/version.h
index 246d163..319f85a 100644
--- a/include/polarssl/version.h
+++ b/include/polarssl/version.h
@@ -58,7 +58,7 @@
  * \return          The constructed version number in the format
  *                  MMNNPP00 (Major, Minor, Patch).
  */
-unsigned int version_get_number();
+unsigned int version_get_number( void );
 
 /**
  * Get the version string ("x.y.z").