diff --git a/srcpkgs/teeworlds/patches/7dc19230d04a895cfc1085cf5b0e62326d6e2cd3.patch b/srcpkgs/teeworlds/patches/7dc19230d04a895cfc1085cf5b0e62326d6e2cd3.patch
new file mode 100644
index 0000000000..3bcc7cb081
--- /dev/null
+++ b/srcpkgs/teeworlds/patches/7dc19230d04a895cfc1085cf5b0e62326d6e2cd3.patch
@@ -0,0 +1,24 @@
+This fixes big endian builds in general.
+
+From 7dc19230d04a895cfc1085cf5b0e62326d6e2cd3 Mon Sep 17 00:00:00 2001
+From: Jordy Ruiz <jordy.ruiz@univ-lille.fr>
+Date: Fri, 26 Apr 2019 17:55:03 +0200
+Subject: [PATCH] Fix s390x: explicit conversion to unsigned
+
+---
+ src/engine/shared/datafile.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/engine/shared/datafile.cpp b/src/engine/shared/datafile.cpp
+index 676800c637..c4e809738e 100644
+--- src/engine/shared/datafile.cpp
++++ src/engine/shared/datafile.cpp
+@@ -172,7 +172,7 @@ bool CDataFileReader::Open(class IStorage *pStorage, const char *pFilename, int
+ 	m_pDataFile = pTmpDataFile;
+ 
+ #if defined(CONF_ARCH_ENDIAN_BIG)
+-	swap_endian(m_pDataFile->m_pData, sizeof(int), min(static_cast<unsigned>(Header.m_Swaplen), Size) / sizeof(int));
++	swap_endian(m_pDataFile->m_pData, sizeof(int), min(static_cast<unsigned>(Header.m_Swaplen), static_cast<unsigned>(Size)) / sizeof(int));
+ #endif
+ 
+ 	//if(DEBUG)