diff --git a/libipt.spec b/libipt.spec
index 70a7b6d..1fd17d0 100644
--- a/libipt.spec
+++ b/libipt.spec
@@ -1,10 +1,11 @@
 Name: libipt
 Version: 1.6.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: Intel Processor Trace Decoder Library
 License: BSD
 URL: https://github.com/01org/processor-trace
 Source0: https://github.com/01org/processor-trace/archive/v%{version}.tar.gz
+Patch1: v1.6.1-implicit-fallthrough.patch
 BuildRequires: cmake
 ExclusiveArch: %{ix86} x86_64
 
@@ -27,6 +28,7 @@ develop programs that use the Intel Processor Trace (Intel PT) Decoder Library.
 
 %prep
 %setup -q -n processor-trace-%{version}
+%patch1 -p1
 
 %build
 # -DPTUNIT:BOOL=ON has no effect on ctest.
@@ -55,6 +57,9 @@ ctest -V %{?_smp_mflags}
 %{_libdir}/%{name}.so
 
 %changelog
+* Fri Jun  9 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 1.6.1-2
+- Fix [-Werror=implicit-fallthrough=] with gcc-7.1.1.
+
 * Fri Jun  9 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 1.6.1-1
 - Rebase to upstream 1.6.1.
 
diff --git a/v1.6.1-implicit-fallthrough.patch b/v1.6.1-implicit-fallthrough.patch
new file mode 100644
index 0000000..f2ddb4f
--- /dev/null
+++ b/v1.6.1-implicit-fallthrough.patch
@@ -0,0 +1,19 @@
+gcc-7.1.1-1.fc27.x86_64
+/home/jkratoch/redhat/fedora/libipt/master/processor-trace-1.6.1/libipt/src/pt_block_decoder.c: In function ‘pt_blk_proceed_no_event_cached’:
+/home/jkratoch/redhat/fedora/libipt/master/processor-trace-1.6.1/libipt/src/pt_block_decoder.c:2282:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
+   if (bce.isize) {
+      ^
+/home/jkratoch/redhat/fedora/libipt/master/processor-trace-1.6.1/libipt/src/pt_block_decoder.c:2328:2: note: here
+  case ptbq_decode: {
+  ^~~~
+
+--- processor-trace-1.6.1-orig/libipt/src/pt_block_decoder.c	2017-05-31 13:30:32.000000000 +0200
++++ processor-trace-1.6.1/libipt/src/pt_block_decoder.c	2017-06-09 07:24:12.644587611 +0200
+@@ -2324,6 +2324,7 @@ static int pt_blk_proceed_no_event_cache
+ 		}
+ 
+ 		/* Fall through to ptbq_decode. */
++		__attribute__ ((fallthrough));
+ 
+ 	case ptbq_decode: {
+ 		struct pt_insn_ext iext;