diff --git a/var/spack/repos/builtin/packages/interproscan/package.py b/var/spack/repos/builtin/packages/interproscan/package.py
index fe0a3acd1b8e574ef555433aa5f32df7182df96e..7ffb7c1da8a4289fc9770449f93c9940b231479e 100644
--- a/var/spack/repos/builtin/packages/interproscan/package.py
+++ b/var/spack/repos/builtin/packages/interproscan/package.py
@@ -42,6 +42,7 @@ class Interproscan(Package):
 
     patch('large-gid.patch', when='@5:')
     patch('non-interactive.patch', when='@:4.8')
+    patch('ps_scan.patch', when='@:4.8')
 
     def install(self, spec, prefix):
         with working_dir('core'):
diff --git a/var/spack/repos/builtin/packages/interproscan/ps_scan.patch b/var/spack/repos/builtin/packages/interproscan/ps_scan.patch
new file mode 100644
index 0000000000000000000000000000000000000000..f34aa2c432fd37f3110b07800f2a02fee28042f3
--- /dev/null
+++ b/var/spack/repos/builtin/packages/interproscan/ps_scan.patch
@@ -0,0 +1,12 @@
+diff -ru a/bin/ps_scan.pl b/bin/ps_scan.pl
+--- a/bin/ps_scan.pl	2020-01-01 14:07:54.243869822 -0600
++++ b/bin/ps_scan.pl	2020-01-01 14:08:03.786850313 -0600
+@@ -8,7 +8,7 @@
+ # Authors: 
+ #   Alexandre Gattiker
+ #   Edouard de Castro; E-mail: ecastro@isb-sib.ch
+-#   Béatrice Cuche (evaluated_by post-processing)
++#   Béatrice Cuche (evaluated_by post-processing)
+ #
+ # Contributions:
+ #   Lorenza Bordoli (repeat method)