diff --git a/cfgparser.h b/cfgparser.h
index 7048c723a9..29a9beba53 100644
--- a/cfgparser.h
+++ b/cfgparser.h
@@ -57,7 +57,7 @@ struct config {
 	void *p;
 	unsigned int type;
 	unsigned int flags;
-	float min,max;
+	double min,max;
   /* Use this field when your need to do something before a new value is
      assigned to your option */
 	cfg_default_func_t default_func;
diff --git a/m_config.h b/m_config.h
index 709ac6cdf5..78d72aa8b0 100644
--- a/m_config.h
+++ b/m_config.h
@@ -71,7 +71,7 @@ struct config {
   void *p; 
   struct m_option_type* type;
   unsigned int flags;
-  float min,max;
+  double min,max;
   void* priv;
 };