diff --git a/doxygen-1.8.20-enums-multiple-files.patch b/doxygen-1.8.20-enums-multiple-files.patch
new file mode 100644
index 0000000..78cb44c
--- /dev/null
+++ b/doxygen-1.8.20-enums-multiple-files.patch
@@ -0,0 +1,86 @@
+From 9d9d08582ccea7ef90000acebfd09f8c8acc577a Mon Sep 17 00:00:00 2001
+From: Dimitri van Heesch <doxygen@gmail.com>
+Date: Fri, 28 Aug 2020 20:22:46 +0200
+Subject: [PATCH] issue #7979: C++ enums being defined in multiple files after
+ b265433 (multi-thread input processing)
+
+---
+ src/scanner.l | 16 ++++++++--------
+ 1 file changed, 8 insertions(+), 8 deletions(-)
+
+diff --git a/src/scanner.l b/src/scanner.l
+index 7c710fa4..70f15d65 100644
+--- a/src/scanner.l
++++ b/src/scanner.l
+@@ -60,6 +60,9 @@
+ 
+ #define USE_STATE2STRING 0
+ 
++static AtomicInt  anonCount;
++static AtomicInt  anonNSCount;
++
+ struct scannerYY_state
+ {
+   OutlineParserInterface *thisParser;
+@@ -105,8 +108,6 @@ struct scannerYY_state
+   int              yyBegLineNr  = 1 ;
+   int              yyColNr      = 1 ;
+   int              yyBegColNr   = 1 ;
+-  int              anonCount    = 0 ;
+-  int              anonNSCount  = 0 ;
+   QCString         yyFileName;
+   MethodTypes      mtype = Method;
+   bool             stat = false;
+@@ -3784,7 +3785,7 @@ OPERATOR  "operator"{B}*({ARITHOP}|{ASSIGNOP}|{LOGICOP}|{BITOP})
+   					  BEGIN(MemberSpecSkip); 
+   					}
+ <TypedefName>";"			{ /* typedef of anonymous type */
+-					  yyextra->current->name.sprintf("@%d",yyextra->anonCount++);
++					  yyextra->current->name.sprintf("@%d",anonCount++);
+ 					  if ((yyextra->current->section == Entry::ENUM_SEC) || (yyextra->current->spec&Entry::Enum))
+ 					  {
+ 					    yyextra->current->program+=','; // add field terminator
+@@ -3859,7 +3860,7 @@ OPERATOR  "operator"{B}*({ARITHOP}|{ASSIGNOP}|{LOGICOP}|{BITOP})
+ 						{
+ 						  // anonymous compound yyextra->inside -> insert dummy variable name
+ 						  //printf("Adding anonymous variable for scope %s\n",p->name.data());
+-						  yyextra->msName.sprintf("@%d",yyextra->anonCount++); 
++						  yyextra->msName.sprintf("@%d",anonCount++); 
+ 						  break;
+ 						}
+ 					      }
+@@ -5644,12 +5645,12 @@ OPERATOR  "operator"{B}*({ARITHOP}|{ASSIGNOP}|{LOGICOP}|{BITOP})
+ 					      }
+ 					      else // use invisible name
+ 					      {
+-					        yyextra->current->name.sprintf("@%d",yyextra->anonNSCount);
++					        yyextra->current->name.sprintf("@%d",anonNSCount.load());
+ 					      }
+ 					    }
+ 					    else
+ 					    {
+-					      yyextra->current->name.sprintf("@%d",yyextra->anonCount++);
++					      yyextra->current->name.sprintf("@%d",anonCount++);
+ 					    }
+ 					  }
+ 					  yyextra->curlyCount=0;
+@@ -7247,7 +7248,6 @@ static void parseMain(yyscan_t yyscanner,
+   yyextra->column = 0;
+   scannerYYrestart(0,yyscanner);
+ 
+-  //yyextra->anonCount     = 0;  // don't reset per file
+   //depthIf       = 0;
+   yyextra->protection    = Public;
+   yyextra->mtype         = Method;
+@@ -7301,7 +7301,7 @@ static void parseMain(yyscan_t yyscanner,
+ 
+   parseCompounds(yyscanner,rt);
+ 
+-  yyextra->anonNSCount++;
++  anonNSCount++;
+ 
+   // add additional entries that were created during processing
+   for (auto &kv: yyextra->outerScopeEntries)
+-- 
+2.26.2
+
diff --git a/doxygen.spec b/doxygen.spec
index d104e77..71aa328 100644
--- a/doxygen.spec
+++ b/doxygen.spec
@@ -16,7 +16,7 @@ Summary: A documentation system for C/C++
 Name:    doxygen
 Epoch:   1
 Version: 1.8.20
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 # No version is specified.
 License: GPL+
@@ -25,6 +25,7 @@ Source0: http://doxygen.nl/files/%{name}-%{version}.src.tar.gz
 # this icon is part of kdesdk
 Source1: doxywizard.desktop
 # upstream patches
+Patch0: doxygen-1.8.20-enums-multiple-files.patch
 
 BuildRequires: %{_bindir}/python3
 BuildRequires: ImageMagick
@@ -302,6 +303,9 @@ desktop-file-install --dir=%{buildroot}%{_datadir}/applications %{SOURCE1}
 %endif
 
 %changelog
+* Fri Aug 28 2020 Scott Talbert <swt@techie.net> - 1:1.8.20-2
+- Fix issue with enums being defined in multiple files
+
 * Tue Aug 25 2020 Than Ngo <than@redhat.com> - 1.8.20-1
 - update to 1.8.20