diff -Nru ecl-20.4.24+ds/debian/changelog ecl-20.4.24+ds/debian/changelog
--- ecl-20.4.24+ds/debian/changelog	2020-08-30 09:28:45.000000000 +0000
+++ ecl-20.4.24+ds/debian/changelog	2020-10-31 11:07:11.000000000 +0000
@@ -1,3 +1,10 @@
+ecl (20.4.24+ds-2) unstable; urgency=medium
+
+  * Add prevent-floating-point-exception.patch, fixing spurious SIGFPE's
+    on ppc64el and ppc64.
+
+ -- Tobias Hansen <thansen@debian.org>  Sat, 31 Oct 2020 11:07:11 +0000
+
 ecl (20.4.24+ds-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru ecl-20.4.24+ds/debian/patches/prevent-floating-point-exception.patch ecl-20.4.24+ds/debian/patches/prevent-floating-point-exception.patch
--- ecl-20.4.24+ds/debian/patches/prevent-floating-point-exception.patch	1970-01-01 00:00:00.000000000 +0000
+++ ecl-20.4.24+ds/debian/patches/prevent-floating-point-exception.patch	2020-10-31 11:06:58.000000000 +0000
@@ -0,0 +1,44 @@
+From cdb602e40de866058aea37e47f886e026b87dd99 Mon Sep 17 00:00:00 2001
+From: Marius Gerbershagen <marius.gerbershagen@gmail.com>
+Date: Sat, 31 Oct 2020 11:34:28 +0100
+Subject: [PATCH] fpe: prevent spurious floating point exceptions in
+ WITH_LISP_FPE
+
+feenableexcept may generate a SIGFPE signal if exception status flags
+are not cleared beforehand. Happens for example on powerpc platforms.
+
+Fixes #612.
+---
+ src/doc/manual/user-guide/embedding.txi | 3 +--
+ src/h/impl/math_fenv.h                  | 4 ++--
+ 2 files changed, 3 insertions(+), 4 deletions(-)
+
+--- a/src/doc/manual/user-guide/embedding.txi
++++ b/src/doc/manual/user-guide/embedding.txi
+@@ -258,8 +258,7 @@
+ later restoring the floating point environment of surrounding C code
+ so that changes in the floating point environment don't leak outside.
+ 
+-@coderef{ECL_WITH_LISP_FPE} can be also used before ECL has booted or
+-before an external thread has been imported.
++@coderef{ECL_WITH_LISP_FPE} can be also used before ECL has booted.
+ 
+ @exindex Safely executing Lisp code with floating point exceptions in embedding program
+ @paragraph Example
+--- a/src/h/impl/math_fenv.h
++++ b/src/h/impl/math_fenv.h
+@@ -75,12 +75,12 @@
+ #  define ECL_WITH_LISP_FPE_BEGIN do {                       \
+         fenv_t __fenv;                                       \
+         fegetenv(&__fenv);                                   \
++        feclearexcept(FE_ALL_EXCEPT);                        \
+         if (ecl_get_option(ECL_OPT_BOOTED) > 0) {            \
+                 int bits = ecl_process_env()->trap_fpe_bits; \
+                 fedisableexcept(FE_ALL_EXCEPT & ~bits);      \
+                 feenableexcept(FE_ALL_EXCEPT & bits);        \
+-        }                                                    \
+-        feclearexcept(FE_ALL_EXCEPT);
++        }
+ # else
+ #  define ECL_WITH_LISP_FPE_BEGIN do {                   \
+         fenv_t __fenv;                                   \
diff -Nru ecl-20.4.24+ds/debian/patches/series ecl-20.4.24+ds/debian/patches/series
--- ecl-20.4.24+ds/debian/patches/series	2020-08-30 08:53:17.000000000 +0000
+++ ecl-20.4.24+ds/debian/patches/series	2020-10-31 11:06:22.000000000 +0000
@@ -6,3 +6,4 @@
 215.patch
 ECL_WITH_LISP_FPE.patch
 ecl.info-max-compression.patch
+prevent-floating-point-exception.patch