diff --git a/libzio.changes b/libzio.changes
index 3d0daed..3a798b2 100644
--- a/libzio.changes
+++ b/libzio.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Feb 28 09:07:36 UTC 2017 - schwab@linux-m68k.org
+
+- Include <signal.h> as required by pthread_sigmask
+
 -------------------------------------------------------------------
 Mon Feb 27 15:48:10 UTC 2017 - werner@suse.de
 
diff --git a/libzio.spec b/libzio.spec
index 685777c..ecb1a7c 100644
--- a/libzio.spec
+++ b/libzio.spec
@@ -26,6 +26,7 @@ Group:          System/Libraries
 Url:            http://libzio.sourceforge.net/
 Source:         http://downloads.sourceforge.net/project/%{name}/%{name}/%{version}/%{name}-%{version}.tar.bz2
 Source1:        baselibs.conf
+Patch:          pthread-sigmask.patch
 BuildRequires:  libbz2-devel
 BuildRequires:  xz-devel
 BuildRequires:  zlib-devel
@@ -57,6 +58,7 @@ and static library.
 
 %prep
 %setup -q
+%patch -p1
 
 %build
 make %{?_smp_mflags} noweak
diff --git a/pthread-sigmask.patch b/pthread-sigmask.patch
new file mode 100644
index 0000000..95f1ab8
--- /dev/null
+++ b/pthread-sigmask.patch
@@ -0,0 +1,13 @@
+Index: libzio-1.03/lzw.h
+===================================================================
+--- libzio-1.03.orig/lzw.h
++++ libzio-1.03/lzw.h
+@@ -48,7 +48,7 @@
+ #include "zioP.h"
+ 
+ #if defined _REENTRANT || defined _THREAD_SAFE
+-# include <pthread.h>
++# include <signal.h>
+ weak_symbol(pthread_sigmask);
+ #endif
+