diff --git a/srcpkgs/calc/patches/endian-32.patch b/srcpkgs/calc/patches/endian-32.patch
new file mode 100644
index 00000000000..a45f22210ad
--- /dev/null
+++ b/srcpkgs/calc/patches/endian-32.patch
@@ -0,0 +1,38 @@
+Description: Restore filepos2z() implementation from apcalc 2.12.1.5
+ Fixes a FTBFS bug on big endian machines.
+ This is probably not the right solution, but at least it works.
+ .
+ Update 2019-01-14: Still required with calc 2.12.7.2 on mips, otherwise, we
+ get this (on minkus.debian.org, sid chroot):
+ .
+ gcc  -DCALC_SRC -DCUSTOM -Wall  -g -O2 -fdebug-prefix-map=/home/mbuck/apcalc-2.12.7.2=. -fstack-protector-strong -Wformat -Werror=format-security   -O3 -g3 -Wno-error=long-long -Wno-long-long -c file.c
+ In file included from qmath.h:32,
+                  from cmath.h:32,
+                  from value.h:33,
+                  from calc.h:33,
+                  from file.c:39:
+ file.c: In function 'filepos2z':
+ zmath.h:85:46: error: incompatible types when assigning to type 'HALF' {aka 'long unsigned int'} from type 'FILEPOS' {aka 'struct _G_fpos_t'}
+  #define SWAP_HALF_IN_B32(dest, src) (*(dest) = *(src))
+                                               ^
+ fposval.h:15:42: note: in expansion of macro 'SWAP_HALF_IN_B32'
+  #define SWAP_HALF_IN_FILEPOS(dest, src)  SWAP_HALF_IN_B32(dest, src)
+                                           ^~~~~~~~~~~~~~~~
+ file.c:1370:2: note: in expansion of macro 'SWAP_HALF_IN_FILEPOS'
+   SWAP_HALF_IN_FILEPOS(ret.v, &pos);
+   ^~~~~~~~~~~~~~~~~~~~
+Bug-Debian: http://bugs.debian.org/414893
+Forwarded: yes
+Author: Martin Buck <mbuck@debian.org>
+---
+--- file.c
++++ file.c
+@@ -1367,7 +1367,7 @@
+ 	ret.len = FILEPOS_BITS/BASEB;
+ 	ret.v = alloc(ret.len);
+ 	zclearval(ret);
+-	SWAP_HALF_IN_FILEPOS(ret.v, &pos);
++	SWAP_HALF_IN_FILEPOS(ret.v, (HALF *)&pos);
+ 	ret.sign = 0;
+ 	ztrim(&ret);
+