diff --git a/include/rofi-types.h b/include/rofi-types.h
index 4970e453..0e75c389 100644
--- a/include/rofi-types.h
+++ b/include/rofi-types.h
@@ -1,6 +1,41 @@
 #ifndef INCLUDE_ROFI_TYPES_H
 #define INCLUDE_ROFI_TYPES_H
 
-extern const char *PropertyTypeName[];
+/**
+ * Type of property
+ */
+typedef enum
+{
+    /** Integer */
+    P_INTEGER,
+    /** Double */
+    P_DOUBLE,
+    /** String */
+    P_STRING,
+    /** Boolean */
+    P_BOOLEAN,
+    /** Color */
+    P_COLOR,
+    /** RofiPadding */
+    P_PADDING,
+    /** Link to global setting */
+    P_LINK,
+    /** Position */
+    P_POSITION,
+    /** Highlight */
+    P_HIGHLIGHT,
+    /** List */
+    P_LIST,
+    /** Orientation */
+    P_ORIENTATION,
+    /** Number of types. */
+    P_NUM_TYPES,
+} PropertyType;
+
+/**
+ * This array maps PropertyType to a user-readable name.
+ * It is important this is kept in sync.
+ */
+extern const char * const PropertyTypeName[P_NUM_TYPES];
 
 #endif // INCLUDE_ROFI_TYPES_H
diff --git a/include/theme.h b/include/theme.h
index c0182e64..5e554b4c 100644
--- a/include/theme.h
+++ b/include/theme.h
@@ -31,7 +31,8 @@
 #include <cairo.h>
 #include <widgets/widget.h>
 #include <settings.h>
-#include "theme.h"
+
+#include "rofi-types.h"
 
 /** Style of text highlight */
 typedef enum
@@ -95,34 +96,6 @@ typedef enum
     ROFI_ORIENTATION_VERTICAL,
     ROFI_ORIENTATION_HORIZONTAL
 } RofiOrientation;
-/**
- * Type of property
- */
-typedef enum
-{
-    /** Integer */
-    P_INTEGER,
-    /** Double */
-    P_DOUBLE,
-    /** String */
-    P_STRING,
-    /** Boolean */
-    P_BOOLEAN,
-    /** Color */
-    P_COLOR,
-    /** RofiPadding */
-    P_PADDING,
-    /** Link to global setting */
-    P_LINK,
-    /** Position */
-    P_POSITION,
-    /** Highlight */
-    P_HIGHLIGHT,
-    /** List */
-    P_LIST,
-    /** Orientation */
-    P_ORIENTATION,
-} PropertyType;
 
 /**
  * Represent the color in theme.
diff --git a/source/rofi-types.c b/source/rofi-types.c
index d0676f40..ae42e97d 100644
--- a/source/rofi-types.c
+++ b/source/rofi-types.c
@@ -3,7 +3,7 @@
 /**
  * Name of the property type
  */
-const char *PropertyTypeName[] = {
+const char * const PropertyTypeName[P_NUM_TYPES] = {
     /** Integer */
     "Integer",
     /** Double */
@@ -14,8 +14,8 @@ const char *PropertyTypeName[] = {
     "Boolean",
     /** Color */
     "Color",
-    /** RofiPadding */
-    "RofiPadding",
+    /** Padding */
+    "Padding",
     /** Link to global setting */
     "Reference",
     /** Position */
diff --git a/source/xrmoptions.c b/source/xrmoptions.c
index af8fe846..1eff4246 100644
--- a/source/xrmoptions.c
+++ b/source/xrmoptions.c
@@ -391,7 +391,6 @@ void config_parse_cmd_options ( void )
 
 static gboolean __config_parser_set_property ( XrmOption *option, const Property *p, char **error  )
 {
-    extern const char *PropertyTypeName[];
     if ( option->type == xrm_String  ) {
         if ( p->type != P_STRING && p->type != P_LIST ) {
             *error = g_strdup_printf ( "Option: %s needs to be set with a string not a %s.", option->name, PropertyTypeName[p->type] );
diff --git a/subprojects/libnkutils b/subprojects/libnkutils
index 2c5f1b26..3467c6a4 160000
--- a/subprojects/libnkutils
+++ b/subprojects/libnkutils
@@ -1 +1 @@
-Subproject commit 2c5f1b2654a9b4480b857cd8395af127a6c55199
+Subproject commit 3467c6a4ee3b7a2f53dfd0e15cd72f00d782a0dd
diff --git a/test/theme-parser-test.c b/test/theme-parser-test.c
index b14b358a..cd9e6ca6 100644
--- a/test/theme-parser-test.c
+++ b/test/theme-parser-test.c
@@ -1233,6 +1233,25 @@ START_TEST ( test_prepare_path )
     g_free ( current_dir );
 }
 END_TEST
+
+
+START_TEST(test_properties_types_names)
+{
+    ck_assert_str_eq ( PropertyTypeName[P_INTEGER],     "Integer");
+    ck_assert_str_eq ( PropertyTypeName[P_DOUBLE],      "Double");
+    ck_assert_str_eq ( PropertyTypeName[P_STRING],      "String");
+    ck_assert_str_eq ( PropertyTypeName[P_BOOLEAN],     "Boolean");
+    ck_assert_str_eq ( PropertyTypeName[P_COLOR],       "Color");
+    ck_assert_str_eq ( PropertyTypeName[P_PADDING],     "Padding");
+    ck_assert_str_eq ( PropertyTypeName[P_LINK],        "Reference");
+    ck_assert_str_eq ( PropertyTypeName[P_POSITION],    "Position");
+    ck_assert_str_eq ( PropertyTypeName[P_HIGHLIGHT],   "Highlight");
+    ck_assert_str_eq ( PropertyTypeName[P_LIST],        "List");
+    ck_assert_str_eq ( PropertyTypeName[P_ORIENTATION], "Orientation");
+
+}
+END_TEST
+
 static Suite * theme_parser_suite (void)
 {
     Suite *s;
@@ -1244,6 +1263,7 @@ static Suite * theme_parser_suite (void)
     {
         tc_core = tcase_create("Core");
         tcase_add_checked_fixture(tc_core, theme_parser_setup, theme_parser_teardown);
+        tcase_add_test(tc_core, test_properties_types_names);
         tcase_add_test(tc_core, test_core_empty_string);
         tcase_add_test(tc_core, test_core_empty_global_section);
         tcase_add_test(tc_core, test_core_empty_section);