Index: vim-9.1.0151/runtime/filetype.vim
===================================================================
--- vim-9.1.0151.orig/runtime/filetype.vim
+++ vim-9.1.0151/runtime/filetype.vim
@@ -2122,7 +2122,7 @@ au BufRead,BufNewFile *.sol			setf solid
 au BufNewFile,BufRead *.rq,*.sparql		setf sparql
 
 " Spec (Linux RPM)
-au BufNewFile,BufRead *.spec			setf spec
+au BufNewFile,BufRead *.spec,*.spec.in		setf spec
 
 " Speedup (AspenTech plant simulator)
 au BufNewFile,BufRead *.speedup,*.spdata,*.spd	setf spup
Index: vim-9.1.0151/runtime/syntax/spec.vim
===================================================================
--- vim-9.1.0151.orig/runtime/syntax/spec.vim
+++ vim-9.1.0151/runtime/syntax/spec.vim
@@ -102,7 +102,7 @@ syn case ignore
 "%% PreAmble Section %%
 "Copyright and Serial were deprecated by License and Epoch
 syn region specPreAmbleDeprecated oneline matchgroup=specError start='^\(Copyright\|Serial\)' end='$' contains=specEmail,specURL,specURLMacro,specLicense,specColon,specVariables,specSpecialChar,specMacroIdentifier
-syn region specPreAmble oneline matchgroup=specCommand start='^\(Prereq\|Summary\|Name\|Version\|Packager\|Requires\|Recommends\|Suggests\|Supplements\|Enhances\|Icon\|URL\|SourceLicense\|Source\d*\|Patch\d*\|Prefix\|Packager\|Group\|License\|Release\|BuildRoot\|Distribution\|Vendor\|Provides\|ExclusiveArch\|ExcludeArch\|ExclusiveOS\|Obsoletes\|BuildArch\|BuildArchitectures\|BuildRequires\|BuildConflicts\|BuildPreReq\|Conflicts\|AutoRequires\|AutoReq\|AutoReqProv\|AutoProv\|Epoch\)' end='$' contains=specEmail,specURL,specURLMacro,specLicense,specColon,specVariables,specSpecialChar,specMacroIdentifier
+syn region specPreAmble oneline matchgroup=specCommand start='^\(Prereq\|Summary\|Name\|Version\|Packager\|Requires\|Recommends\|Suggests\|Supplements\|Enhances\|Icon\|URL\|SourceLicense\|Source\d*\|Patch\d*\|Prefix\|Packager\|Group\|License\|Release\|BuildRoot\|Distribution\|Vendor\|Provides\|ExclusiveArch\|ExcludeArch\|ExclusiveOS\|Obsoletes\|BuildArch\|BuildArchitectures\|BuildRequires\|BuildConflicts\|BuildPreReq\|Conflicts\|AutoRequires\|AutoReq\|AutoReqProv\|AutoProv\|Epoch\|Freshens\|EssentialFor\)' end='$' contains=specEmail,specURL,specURLMacro,specLicense,specColon,specVariables,specSpecialChar,specMacroIdentifier
 
 "%% Description Section %%
 syn region specDescriptionArea matchgroup=specSection start='^%description' end='^%'me=e-1 contains=specDescriptionOpts,specEmail,specURL,specNumber,specMacroIdentifier,specComment