diff --git a/clamav-0.99-private.patch b/clamav-private.patch
similarity index 64%
rename from clamav-0.99-private.patch
rename to clamav-private.patch
index 7f9f563..41dd4c5 100644
--- a/clamav-0.99-private.patch
+++ b/clamav-private.patch
@@ -8,8 +8,17 @@
 +Libs.private: -L${libdir} -lclamav @LIBCLAMAV_LIBS@
  Cflags: -I${includedir}
  
---- clamav-0.99/clamav-config.in		2015-05-28 23:56:25.000000000 +0200
-+++ clamav-0.99/clamav-config.in.private	2015-12-02 01:31:34.933705763 +0100
+diff -up clamav-1.0.0/clamav-config.in.private clamav-1.0.0/clamav-config.in
+--- clamav-1.0.0/clamav-config.in.private	2023-01-22 17:40:01.711757908 -0700
++++ clamav-1.0.0/clamav-config.in	2023-01-22 18:01:06.188743168 -0700
+@@ -4,7 +4,6 @@
+ prefix=@prefix@
+ exec_prefix=@exec_prefix@
+ includedir=@includedir@
+-libdir=@libdir@
+ 
+ usage()
+ {
 @@ -54,12 +54,8 @@
  	usage 0
  	;;
diff --git a/clamav-types.h b/clamav-types.h
new file mode 100644
index 0000000..ffa83b7
--- /dev/null
+++ b/clamav-types.h
@@ -0,0 +1,14 @@
+#ifndef CLAMAV_TYPES_H_MULTILIB
+#define CLAMAV_TYPES_H_MULTILIB
+
+#include <bits/wordsize.h>
+
+#if __WORDSIZE == 32
+# include "clamav-types-32.h"
+#elif __WORDSIZE == 64
+# include "clamav-types-64.h"
+#else
+# error "unexpected value for __WORDSIZE macro"
+#endif
+
+#endif
diff --git a/clamav.spec b/clamav.spec
index 7b9f6b9..8f24f73 100644
--- a/clamav.spec
+++ b/clamav.spec
@@ -25,7 +25,7 @@
 Summary:    End-user tools for the Clam Antivirus scanner
 Name:       clamav
 Version:    1.0.0
-Release:    1%{?dist}
+Release:    2%{?dist}
 License:    %{?with_unrar:proprietary}%{!?with_unrar:GPLv2}
 URL:        https://www.clamav.net/
 %if %{with unrar}
@@ -37,6 +37,8 @@ Source999:  https://www.clamav.net/downloads/production/%{name}-%{version}%{?pre
 # tarball was created with update_clamav.sh
 Source0:    %{name}-%{version}%{?prerelease}-norar.tar.xz
 %endif
+# Multilib headers
+Source1:    clamav-types.h
 #for server
 Source3:    clamd.logrotate
 Source5:    clamd-README
@@ -65,7 +67,7 @@ Source530:  clamd@.service
 # Change default config locations for Fedora
 Patch1:     clamav-default_confs.patch
 # Fix pkg-config flags for static linking, multilib
-Patch2:     clamav-0.99-private.patch
+Patch2:     clamav-private.patch
 # Remove rpath
 Patch3:     clamav-rpath.patch
 # Modify clamav-clamonacc.service for Fedora compatibility
@@ -362,6 +364,16 @@ cat << EOF > %{buildroot}%{_tmpfilesdir}/clamav-milter.conf
 d %{_rundir}/clamav-milter 0710 %{milteruser} %{milteruser}
 EOF
 
+#Fixup headers and scripts for multilib
+%if 0%{?__isa_bits} == 64
+mv %{buildroot}%{_includedir}/clamav-types.h \
+   %{buildroot}%{_includedir}/clamav-types-64.h
+%else
+mv %{buildroot}%{_includedir}/clamav-types.h \
+   %{buildroot}%{_includedir}/clamav-types-32.h
+%endif
+install -m 0644 %SOURCE1 %{buildroot}%{_includedir}/clamav-types.h
+
 # TODO: Evaluate using upstream's unit with clamav-daemon.socket
 rm %{buildroot}%{_unitdir}/clamav-daemon.*
 
@@ -537,6 +549,9 @@ exit 0
 
 
 %changelog
+* Mon Jan 23 2023 Orion Poplawski <orion@nwra.com> - 1.0.0-2
+- Fix multilib install
+
 * Sun Jan 22 2023 Orion Poplawski <orion@nwra.com> - 1.0.0-1
 - Update to 1.0.0