diff --git a/cil-1.7.3-gcc-7.patch b/cil-1.7.3-gcc-7.patch
new file mode 100644
index 0000000..59cc4a1
--- /dev/null
+++ b/cil-1.7.3-gcc-7.patch
@@ -0,0 +1,11 @@
+--- cil-1.7.3/lib/App/Cilly.pm.in	2013-07-24 16:07:11.000000000 +0100
++++ cil-1.7.3.new/lib/App/Cilly.pm.in	2017-02-14 13:02:52.517194526 +0000
+@@ -2220,7 +2220,7 @@
+          . join(' ', @{$self->{PPARGS}}) ." |") 
+         || die "Cannot start GNUCC";
+     while(<VER>) {
+-        if($_ =~ m|^(\d+\S+)| || $_ =~ m|^(egcs-\d+\S+)|) {
++        if($_ =~ m|^(\d+\S+)| || $_ =~ m|^(\d+)$| || $_ =~ m|^(egcs-\d+\S+)|) {
+             $cversion = "gcc_$1";
+             close(VER) || die "Cannot start GNUCC\n";
+             $self->{CVERSION} = $cversion;
diff --git a/ocaml-cil.spec b/ocaml-cil.spec
index 99e3ad3..61fa4fd 100644
--- a/ocaml-cil.spec
+++ b/ocaml-cil.spec
@@ -5,7 +5,7 @@
 
 Name:           ocaml-cil
 Version:        1.7.3
-Release:        28%{?dist}
+Release:        29%{?dist}
 Summary:        CIL - Infrastructure for C Program Analysis and Transformation
 License:        BSD
 
@@ -34,6 +34,10 @@ Patch4:         ocaml-4.02.0.patch
 # Fix for bytecode compilation (only apply this when !opt).
 Patch5:         cil-1.7.3-bytecode-compilation.patch
 
+# Fix compilation with GCC 7.
+# gcc -dumpversion prints just "7", adjust the regex accordingly.
+Patch6:         cil-1.7.3-gcc-7.patch
+
 %description
 CIL (C Intermediate Language) is a high-level representation along
 with a set of tools that permit easy analysis and source-to-source
@@ -120,6 +124,7 @@ for gcc.
 %if !%opt
 %patch5 -p1
 %endif
+%patch6 -p1
 
 %build
 
@@ -195,6 +200,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Tue Feb 14 2017 Richard W.M. Jones <rjones@redhat.com> - 1.7.3-29
+- Fix compilation with GCC 7.
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.7.3-28
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild