diff --git a/.github/workflows/LinuxInstall.yml b/.github/workflows/LinuxInstall.yml
index a99d6c63..3d46ecc7 100644
--- a/.github/workflows/LinuxInstall.yml
+++ b/.github/workflows/LinuxInstall.yml
@@ -26,7 +26,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libxcb-cursor0 libspeechd2 gnupg2 wget appstream libcups2 libcups2-dev
+          sudo apt-get install -y autoconf autoconf-archive automake libtool libxcb-cursor0 libspeechd2 gnupg2 wget appstream libcups2 libcups2-dev
 
       - name: Checkout repository
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
diff --git a/changes/cursor-fix-linux-appimage-gperf-5319.md b/changes/cursor-fix-linux-appimage-gperf-5319.md
new file mode 100644
index 00000000..7be5bbef
--- /dev/null
+++ b/changes/cursor-fix-linux-appimage-gperf-5319.md
@@ -0,0 +1,4 @@
+Category: internal
+Audience: Maintainers
+Breaking-Change: no
+Summary: Install autoconf, autoconf-archive, automake, and libtool in the Linux AppImage workflow so vcpkg can build gperf for fontconfig, and initialize PdfTool before the install smoke script runs version probes.
diff --git a/scripts/smoke-test-install.ps1 b/scripts/smoke-test-install.ps1
index 7d888c15..62702af4 100644
--- a/scripts/smoke-test-install.ps1
+++ b/scripts/smoke-test-install.ps1
@@ -186,6 +186,8 @@ foreach ($item in $requiredFiles) {
     Write-Host "OK: $($item.Label)"
 }
 
+$pdfTool = Join-Path $InstallDir "PdfTool.exe"
+
 $versionOutput = @(& $pdfTool --version 2>&1)
 $versionExit = $LASTEXITCODE
 $versionText = $versionOutput -join "`n"
@@ -248,7 +250,6 @@ if ([string]::IsNullOrWhiteSpace($TestPdf) -or -not (Test-Path -LiteralPath $Tes
 }
 
 $profilePath = Join-Path $ProfilesDir "loop-default.json"
-$pdfTool = Join-Path $InstallDir "PdfTool.exe"
 $editor = Join-Path $InstallDir "LoopEditor.exe"
 # Strip Qt from PATH so preflight cannot silently resolve ICU/Qt deps from a
 # developer or CI toolchain install — the bundle must be self-contained (MIC-301).