diff --git a/libs/video/renderer/vulkan/vkgen/vkfieldcustom.r b/libs/video/renderer/vulkan/vkgen/vkfieldcustom.r
index 3e9e56c74..7c7843414 100644
--- a/libs/video/renderer/vulkan/vkgen/vkfieldcustom.r
+++ b/libs/video/renderer/vulkan/vkgen/vkfieldcustom.r
@@ -1,4 +1,5 @@
 #include <PropertyList.h>
+#include <string.h>
 
 #include "vkfieldcustom.h"
 #include "vkgen.h"
@@ -14,13 +15,19 @@
 	}
 
 	PLItem     *desc = [item getObjectForKey:"type"];
-	pltype = [[desc getObjectAtIndex:1] string];
-	parser = [[desc getObjectAtIndex:2] string];
+	pltype = str_hold ([[desc getObjectAtIndex:1] string]);
+	parser = str_hold ([[desc getObjectAtIndex:2] string]);
 
 	fields = [item getObjectForKey:"fields"];
 	return self;
 }
 
+-(void)dealloc
+{
+	str_free (pltype);
+	str_free (parser);
+}
+
 -writeParseData
 {
 	fprintf (output_file, "static size_t parse_%s_%s_offsets[] = {\n",
diff --git a/libs/video/renderer/vulkan/vkgen/vkfieldtype.r b/libs/video/renderer/vulkan/vkgen/vkfieldtype.r
index e3d7cf59d..cb1a04508 100644
--- a/libs/video/renderer/vulkan/vkgen/vkfieldtype.r
+++ b/libs/video/renderer/vulkan/vkgen/vkfieldtype.r
@@ -14,6 +14,7 @@
 
 -(void)dealloc
 {
+	str_free (type);
 	str_free (parser);
 	str_free (parse_type);
 }
@@ -42,12 +43,13 @@ parseItemType (PLItem *item)
 	type = [item string];
 	if (type) {
 		Type       *field_type = [[Type lookup:type] dereference];
+		type = str_hold (type);
 		parse_type = [field_type parseType];
 		parser = str_hold ("parse_" + type);
 	} else {
 		parse_type = parseItemType([item getObjectForKey:"parse_type"]);
-		type = [[item getObjectForKey:"type"] string];
-		parser = [[item getObjectForKey:"parser"] string];
+		type = str_hold ([[item getObjectForKey:"type"] string]);
+		parser = str_hold ([[item getObjectForKey:"parser"] string]);
 	}
 
 	return self;