diff --git a/common/configopts.c b/common/configopts.c
index 87b0b2057..64752637b 100644
--- a/common/configopts.c
+++ b/common/configopts.c
@@ -423,6 +423,8 @@ cfg_new(void)
     cfg_set_validate_func(cfg, "screen|tags|tag|ncol", config_validate_supone_int);
 
     /* Check float values */
+    cfg_set_validate_func(cfg, "screen|general|mwfact_lower_limit", config_validate_zero_one_float);
+    cfg_set_validate_func(cfg, "screen|general|mwfact_upper_limit", config_validate_zero_one_float);
     cfg_set_validate_func(cfg, "screen|tags|tag|mwfact", config_validate_zero_one_float);
 
     return cfg;
diff --git a/config.c b/config.c
index c6acb741d..317a728f8 100644
--- a/config.c
+++ b/config.c
@@ -334,20 +334,6 @@ config_parse_screen(cfg_t *cfg, int screen)
     virtscreen->mwfact_lower_limit = cfg_getfloat(cfg_general, "mwfact_lower_limit");
     virtscreen->mwfact_upper_limit = cfg_getfloat(cfg_general, "mwfact_upper_limit");
 
-    if(virtscreen->mwfact_lower_limit < 0 || virtscreen->mwfact_lower_limit > 1)
-    {
-        warn("incorrect value %f for mwfact_lower_limit, must be between 0 and 1\n",
-             virtscreen->mwfact_lower_limit);
-        virtscreen->mwfact_lower_limit = 0.1;
-    }
-
-    if(virtscreen->mwfact_upper_limit < 0 || virtscreen->mwfact_upper_limit > 1)
-    {
-        warn("incorrect value %f for mwfact_upper_limit, must be between 0 and 1\n",
-             virtscreen->mwfact_lower_limit);
-        virtscreen->mwfact_upper_limit = 0.9;
-    }
-
     if(virtscreen->mwfact_upper_limit < virtscreen->mwfact_lower_limit)
     {
         warn("mwfact_upper_limit must be greater than mwfact_lower_limit\n");