diff --git a/pegasus-2.14.1-fix-Wreserved-user-defined-literal.patch b/pegasus-2.14.1-fix-Wreserved-user-defined-literal.patch
new file mode 100644
index 0000000..5078f3b
--- /dev/null
+++ b/pegasus-2.14.1-fix-Wreserved-user-defined-literal.patch
@@ -0,0 +1,22 @@
+--- pegasus/src/Pegasus/Common/InternalException.cpp.orig	2020-03-25 04:14:59.507215411 +0000
++++ pegasus/src/Pegasus/Common/InternalException.cpp	2020-03-25 04:06:31.545770255 +0000
+@@ -982,7 +982,7 @@ SocketWriteError::~SocketWriteError()
+ //     PEGASUS_MAXELEMENTS_NUM HTTP header fields in a single HTTP message
+ //==============================================================================
+ TooManyHTTPHeadersException::TooManyHTTPHeadersException()
+-    : Exception("more than "PEGASUS_MAXELEMENTS
++    : Exception("more than " PEGASUS_MAXELEMENTS
+                     " header fields detected in HTTP message")
+ {
+ }
+--- pegasus/src/Pegasus/Client/tests/slp/slpclient.cpp.orig	2020-03-25 04:21:46.078970915 +0000
++++ pegasus/src/Pegasus/Client/tests/slp/slpclient.cpp	2020-03-25 04:22:16.302878401 +0000
+@@ -49,7 +49,7 @@ int main(int argc, char** argv)
+ 
+         Array<Attribute> criteria;
+         Attribute attr(
+-            PEG_WBEM_SLP_SERVICE_ID"="PEG_WBEM_SLP_SERVICE_ID_DEFAULT);
++            PEG_WBEM_SLP_SERVICE_ID"=" PEG_WBEM_SLP_SERVICE_ID_DEFAULT);
+         Array<CIMServerDescription> connections;
+         SLPClientOptions* opts = (SLPClientOptions*)NULL;
+         if (argc == 2)
diff --git a/tog-pegasus.spec b/tog-pegasus.spec
index 030d753..f0d9c2e 100644
--- a/tog-pegasus.spec
+++ b/tog-pegasus.spec
@@ -8,7 +8,7 @@
 
 Name:           tog-pegasus
 Version:        %{major_ver}.1
-Release:        51%{?dist}
+Release:        52%{?dist}
 Epoch:          2
 Summary:        OpenPegasus WBEM Services for Linux
 
@@ -97,6 +97,8 @@ Patch40:        pegasus-2.14.1-tesid.patch
 Patch41:        pegasus-2.14.1-ssl-cert-path.patch
 # 42: port to openssl-1.1
 Patch42:        pegasus-2.14.1-openssl-1.1-fix.patch
+# 43: fix -Wreserved-user-defined-literal warnings which prevents building with clang
+Patch43:	pegasus-2.14.1-fix-Wreserved-user-defined-literal.patch
 
 BuildRequires:  procps, libstdc++, pam-devel
 BuildRequires:  openssl, openssl-devel
@@ -247,6 +249,7 @@ yes | mak/CreateDmtfSchema 238 %{SOURCE9} cim_schema_2.38.0
 %patch40 -p1 -b .testid
 %patch41 -p1 -b .ssl-cert-path
 %patch42 -p1 -b .openssl-1.1-fix
+%patch43 -p1 -b .Wreserved-user-defined-literal-fix
 
 
 %build
@@ -548,6 +551,9 @@ fi
 
 
 %changelog
+* Wed Mar 25 2020 Tom Stellard <tstellar@redhat.com> - 2:2.14.1-52
+- Fix -Wreserved-user-defined-literal warnings
+
 * Thu Feb 27 2020 Vitezslav Crhonek <vcrhonek@redhat.com> - 2:2.14.1-51
 - Fix tmpfiles path