diff --git a/debian/patches/fix-parallel-build.patch b/debian/patches/fix-parallel-build.patch
new file mode 100644
index 0000000000000000000000000000000000000000..f575096c909b471120d312de4596059192da0823
--- /dev/null
+++ b/debian/patches/fix-parallel-build.patch
@@ -0,0 +1,40 @@
+Description: Fix parallel build
+ hdrl_multiiter-test and hdrl_frameiter-test use the same base names for their
+ data with a pid suffix but remove all files without using the pid suffix :
+
+ char * fn = cpl_sprintf("frameiter%zu_%zd.fits", i, (intptr_t)getpid());
+ ...
+ if (system("rm -f frameiter*fits")) {}
+
+ So potentially, in parallel builds, tests can remove the files from the
+ other one which happens systematically to me, which leads to a sigsev.
+ This fix removes only the pid suffixed .fits created by the current process.
+Author: Frédéric Bonnard <frediz@debian.org>
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/mosca/hdrl/tests/hdrl_multiiter-test.c
++++ b/mosca/hdrl/tests/hdrl_multiiter-test.c
+@@ -231,7 +231,9 @@
+     cpl_test_error(CPL_ERROR_NONE);
+ 
+ 	cpl_frameset_delete(frames);
+-    if (system("rm -f frameiter*fits")) {}
++    char * rm_fns = cpl_sprintf("rm -fr frameiter*_%zd.fits", (intptr_t)getpid());
++    if (system(rm_fns)) {}
++    cpl_free(rm_fns);
+ 
+     cpl_test_error(CPL_ERROR_NONE);
+ 
+--- a/mosca/hdrl/tests/hdrl_frameiter-test.c
++++ b/mosca/hdrl/tests/hdrl_frameiter-test.c
+@@ -292,7 +292,9 @@
+     }
+ 
+     cpl_frameset_delete(frames);
+-    if (system("rm -f frameiter*fits")) {}
++    char * rm_fns = cpl_sprintf("rm -fr frameiter*_%zd.fits", (intptr_t)getpid());
++    if (system(rm_fns)) {}
++    cpl_free(rm_fns);
+ }
+ 
+ /*----------------------------------------------------------------------------*/
diff --git a/debian/patches/series b/debian/patches/series
index 01835f1aa9a78ec005ec725cb63cabbdfb38a290..6c72ca6fa377b7526410b3d2041635b66e733039 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -4,3 +4,4 @@ Use-system-provided-sextractor-binary.patch
 Disable-buggy-libmosca-testsuite.patch
 Increase-tolerance-to-fix-FTBS-on-mips-mipsel64-and-ia64.patch
 Force-serial-tests-for-better-verbose-output.patch
+fix-parallel-build.patch
\ No newline at end of file