diff --git a/xs/src/expat/xmlparse.c b/xs/src/expat/xmlparse.c
index 30a24a0f8..fbe5e0200 100644
--- a/xs/src/expat/xmlparse.c
+++ b/xs/src/expat/xmlparse.c
@@ -710,8 +710,11 @@ generate_hash_secret_salt(XML_Parser parser)
 {
   /* Process ID is 0 bits entropy if attacker has local access
    * XML_Parser address is few bits of entropy if attacker has local access */
+  // Prusa3D specific: Fix for a following warning, which turns to an error on some Perl/XS installations:
+  // error: cast from 'XML_Parser' to 'long unsigned int' loses precision [-fpermissive]
+  unsigned long *parser_addr = (unsigned long*)&parser;
   const unsigned long entropy =
-      gather_time_entropy() ^ getpid() ^ (unsigned long)parser;
+      gather_time_entropy() ^ getpid() ^ *parser_addr;
 
   /* Factors are 2^31-1 and 2^61-1 (Mersenne primes M31 and M61) */
   if (sizeof(unsigned long) == 4) {