diff --git a/tools/kconfig_new/confgen.py b/tools/kconfig_new/confgen.py
index d4e875290..0765c9f89 100755
--- a/tools/kconfig_new/confgen.py
+++ b/tools/kconfig_new/confgen.py
@@ -475,7 +475,9 @@ def write_json_menus(deprecated_options, config, filename):
                 # should have one condition which is true
                 for min_range, max_range, cond_expr in sym.ranges:
                     if kconfiglib.expr_value(cond_expr):
-                        greatest_range = [int(min_range.str_value), int(max_range.str_value)]
+                        base = 16 if sym.type == kconfiglib.HEX else 10
+                        greatest_range = [int(min_range.str_value, base), int(max_range.str_value, base)]
+                    break
 
             new_json = {
                 "type": kconfiglib.TYPE_TO_STR[sym.type],
diff --git a/tools/kconfig_new/test/Kconfig b/tools/kconfig_new/test/Kconfig
index 6462fe82d..8529fd520 100644
--- a/tools/kconfig_new/test/Kconfig
+++ b/tools/kconfig_new/test/Kconfig
@@ -41,6 +41,12 @@ menu "Test config"
         range 0 10
         default 1
 
+    config TEST_CONDITIONAL_HEX_RANGES
+        hex "Something with a hex range"
+        range 0x00 0xaf if TEST_BOOL
+        range 0x10 0xaf
+        default 0xa0
+
     config SUBMENU_TRIGGER
         bool "I enable/disable some submenu items"
         default y
diff --git a/tools/kconfig_new/test/testcases_v1.txt b/tools/kconfig_new/test/testcases_v1.txt
index 4563d4928..0f68536cc 100644
--- a/tools/kconfig_new/test/testcases_v1.txt
+++ b/tools/kconfig_new/test/testcases_v1.txt
@@ -1,6 +1,6 @@
 * Set TEST_BOOL, showing child items
 > { "TEST_BOOL" : true }
-< { "values" : { "TEST_BOOL" : true, "TEST_CHILD_STR" : "OHAI!", "TEST_CHILD_BOOL" : true }, "ranges": {"TEST_CONDITIONAL_RANGES": [0, 100]} }
+< { "values" : { "TEST_BOOL" : true, "TEST_CHILD_STR" : "OHAI!", "TEST_CHILD_BOOL" : true }, "ranges": {"TEST_CONDITIONAL_RANGES": [0, 100], "TEST_CONDITIONAL_HEX_RANGES": [0, 175]} }
 
 * Set TEST_CHILD_STR
 > { "TEST_CHILD_STR" : "Other value" }
@@ -8,7 +8,7 @@
 
 * Clear TEST_BOOL, hiding child items
 > { "TEST_BOOL" : false }
-< { "values" : { "TEST_BOOL" : false, "TEST_CHILD_STR" : null, "TEST_CHILD_BOOL" : null },  "ranges": {"TEST_CONDITIONAL_RANGES": [0, 10]} }
+< { "values" : { "TEST_BOOL" : false, "TEST_CHILD_STR" : null, "TEST_CHILD_BOOL" : null },  "ranges": {"TEST_CONDITIONAL_RANGES": [0, 10], "TEST_CONDITIONAL_HEX_RANGES": [16, 175]} }
 
 * Set TEST_CHILD_BOOL, invalid as parent is disabled
 > { "TEST_CHILD_BOOL" : false }
diff --git a/tools/kconfig_new/test/testcases_v2.txt b/tools/kconfig_new/test/testcases_v2.txt
index 77d23bf66..7a735fd1a 100644
--- a/tools/kconfig_new/test/testcases_v2.txt
+++ b/tools/kconfig_new/test/testcases_v2.txt
@@ -1,6 +1,6 @@
 * Set TEST_BOOL, showing child items
 > { "TEST_BOOL" : true }
-< { "values" : { "TEST_BOOL" : true, "TEST_CHILD_STR" : "OHAI!", "TEST_CHILD_BOOL" : true }, "ranges": {"TEST_CONDITIONAL_RANGES": [0, 100]}, "visible": {"TEST_CHILD_BOOL" : true, "TEST_CHILD_STR" : true} }
+< { "values" : { "TEST_BOOL" : true, "TEST_CHILD_STR" : "OHAI!", "TEST_CHILD_BOOL" : true }, "ranges": {"TEST_CONDITIONAL_RANGES": [0, 100], "TEST_CONDITIONAL_HEX_RANGES": [0, 175]}, "visible": {"TEST_CHILD_BOOL" : true, "TEST_CHILD_STR" : true} }
 
 * Set TEST_CHILD_STR
 > { "TEST_CHILD_STR" : "Other value" }
@@ -8,7 +8,7 @@
 
 * Clear TEST_BOOL, hiding child items
 > { "TEST_BOOL" : false }
-< { "values" : { "TEST_BOOL" : false },  "ranges": {"TEST_CONDITIONAL_RANGES": [0, 10]}, "visible": { "TEST_CHILD_BOOL" : false, "TEST_CHILD_STR" : false } }
+< { "values" : { "TEST_BOOL" : false },  "ranges": {"TEST_CONDITIONAL_RANGES": [0, 10], "TEST_CONDITIONAL_HEX_RANGES": [16, 175]}, "visible": { "TEST_CHILD_BOOL" : false, "TEST_CHILD_STR" : false } }
 
 * Set TEST_CHILD_BOOL, invalid as parent is disabled
 > { "TEST_CHILD_BOOL" : false }