diff --git a/lp64.patch b/lp64.patch
new file mode 100644
index 0000000..43e1fd8
--- /dev/null
+++ b/lp64.patch
@@ -0,0 +1,13 @@
+Index: rttr-0.9.6/src/rttr/detail/base/core_prerequisites.h
+===================================================================
+--- rttr-0.9.6.orig/src/rttr/detail/base/core_prerequisites.h
++++ rttr-0.9.6/src/rttr/detail/base/core_prerequisites.h
+@@ -89,7 +89,7 @@ namespace rttr
+ // Architecture
+ /////////////////////////////////////////////////////////////////////////////////////////
+ #if defined(__x86_64__) || defined(_M_X64) || defined(__powerpc64__) || defined(__alpha__) ||\
+-    defined(__ia64__) || defined(__s390__) || defined(__s390x__)
++    defined(__ia64__) || defined(__s390__) || defined(__s390x__) || defined(_LP64) || defined(__LP64__)
+ #   define RTTR_ARCH_TYPE RTTR_ARCH_64
+ #else
+ #   define RTTR_ARCH_TYPE RTTR_ARCH_32
diff --git a/rttr.changes b/rttr.changes
index 0cb2e51..14a8561 100644
--- a/rttr.changes
+++ b/rttr.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed May  8 07:42:41 UTC 2019 - Andreas Schwab <schwab@suse.de>
+
+- lp64.patch: Support all LP64 architectures
+
 -------------------------------------------------------------------
 Fri Mar 29 11:27:35 UTC 2019 - Luca Beltrame <lbeltrame@kde.org>
 
diff --git a/rttr.spec b/rttr.spec
index 0c67fa6..f5f31cd 100644
--- a/rttr.spec
+++ b/rttr.spec
@@ -34,6 +34,8 @@ Patch2:         doxygen_remove_date_time.patch
 Patch3:         skip_json_example.patch
 # PATCH-FIX-OPENSUSE fix-include-permissions.patch fix wrong permissions of headers (https://github.com/rttrorg/rttr/issues/147)
 Patch4:         fix-include-permissions.patch
+# PATCH-FIX-UPSTREAM lp64.patch Support all LP64 architectures (https://github.com/rttrorg/rttr/pull/231)
+Patch5:         lp64.patch
 BuildRequires:  cmake
 BuildRequires:  dos2unix
 BuildRequires:  doxygen
@@ -53,6 +55,7 @@ library itself, which is written in C++.
 %patch2 -p1
 %patch3 -p1
 %patch4 -p1
+%patch5 -p1
 
 %build
 find . -type f -exec chmod a-x "{}" +