diff --git a/audacity-implicit-fortify-decl.patch b/audacity-implicit-fortify-decl.patch
new file mode 100644
index 0000000..9e1a678
--- /dev/null
+++ b/audacity-implicit-fortify-decl.patch
@@ -0,0 +1,17 @@
+Index: b/lib-src/libnyquist/nyquist/xlisp/security.c
+===================================================================
+--- a/lib-src/libnyquist/nyquist/xlisp/security.c	2020-06-15 10:39:50.030730823 +0200
++++ b/lib-src/libnyquist/nyquist/xlisp/security.c	2020-06-15 10:59:45.779010172 +0200
+@@ -4,12 +4,7 @@
+  */
+ 
+ #include <stdlib.h>
+-#if defined(UNIX) || defined(__APPLE__)
+ #include <unistd.h>
+-#endif
+-#ifdef WIN32
+-#include <direct.h>
+-#endif
+ #include <string.h>
+ #include <xlisp.h>
+ 
diff --git a/audacity.changes b/audacity.changes
index a5eae41..b10457a 100644
--- a/audacity.changes
+++ b/audacity.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jun 15 09:28:20 UTC 2020 - Dave Plater <davejplater@gmail.com>
+
+- Fix Leap:15.1 build with audacity-implicit-fortify-decl.patch.
+
 -------------------------------------------------------------------
 Mon Jun  8 09:37:32 UTC 2020 - Dave Plater <davejplater@gmail.com>
 
diff --git a/audacity.spec b/audacity.spec
index ba09190..6b3d77d 100644
--- a/audacity.spec
+++ b/audacity.spec
@@ -34,6 +34,8 @@ Patch1:         audacity-flacversion.patch
 Patch2:         audacity-misc-errors.patch
 # PATCH-FIX-UPSTREAM audacity-no_return_in_nonvoid.patch
 Patch3:         audacity-no_return_in_nonvoid.patch
+# PATCH-FIX-OPENSUSE audacity-implicit-fortify-decl.patch davejplater@gmail.com -- Leap:15.1's build misses "UNIX" definition in nyquist/xlisp/security.c
+Patch4:         audacity-implicit-fortify-decl.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  cmake
@@ -99,8 +101,7 @@ This package contains extra plugins for audacity.
 
 cp -f %{SOURCE1} LICENSE_NYQUIST.txt
 # Make sure we use the system versions.
-rm -rf lib-src/{expat,libvamp,libsoxr,ffmpeg}/
-rm -rf lib-src/lame
+rm -rf lib-src/{expat,libvamp,libsoxr,ffmpeg,lame}/
 
 %build
 export CFLAGS="%{optflags} -fno-strict-aliasing"
@@ -135,6 +136,7 @@ mv -f %{buildroot}%{_datadir}/pixmaps/gnome-mime-application-x-audacity-project.
   %{buildroot}%{_datadir}/icons/hicolor/48x48/mimetypes/application-x-audacity-project.xpm
 rm -rf %{buildroot}%{_datadir}/pixmaps/
 rm %{buildroot}%{_docdir}/%{name}/LICENSE.txt
+cp -v lib-src/portmixer/LICENSE.txt portmixer.LICENSE.txt
 %find_lang %{name}
 
 %files plugins
@@ -145,7 +147,7 @@ rm %{buildroot}%{_docdir}/%{name}/LICENSE.txt
 %files
 %defattr(-,root,root)
 %doc README.txt
-%license LICENSE.txt LICENSE_NYQUIST.txt
+%license LICENSE.txt LICENSE_NYQUIST.txt portmixer.LICENSE.txt
 %doc %{_docdir}/%{name}/
 %{_bindir}/%{name}
 %{_datadir}/%{name}/