diff --git a/src/Standards/PEAR/Sniffs/Functions/FunctionDeclarationSniff.php b/src/Standards/PEAR/Sniffs/Functions/FunctionDeclarationSniff.php
index 14479e2c0a..d907fca2c6 100644
--- a/src/Standards/PEAR/Sniffs/Functions/FunctionDeclarationSniff.php
+++ b/src/Standards/PEAR/Sniffs/Functions/FunctionDeclarationSniff.php
@@ -308,7 +308,7 @@ public function processMultiLineDeclaration($phpcsFile, $stackPtr, $tokens)
                 $phpcsFile->fixer->addContent($prev, ' {');
 
                 // If the opener is on a line by itself, removing it will create
-                // an empty line, so just remove the entire line instead.
+                // an empty line, so remove the entire line instead.
                 $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($opener - 1), $closeBracket, true);
                 $next = $phpcsFile->findNext(T_WHITESPACE, ($opener + 1), null, true);
 
@@ -324,7 +324,9 @@ public function processMultiLineDeclaration($phpcsFile, $stackPtr, $tokens)
                 } else {
                     // Just remove the opener.
                     $phpcsFile->fixer->replaceToken($opener, '');
-                    if ($tokens[$next]['line'] === $tokens[$opener]['line']) {
+                    if ($tokens[$next]['line'] === $tokens[$opener]['line']
+                        && ($opener + 1) !== $next
+                    ) {
                         $phpcsFile->fixer->replaceToken(($opener + 1), '');
                     }
                 }
diff --git a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc
index fb7cb52f4d..52beaff772 100644
--- a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc
+++ b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc
@@ -465,3 +465,12 @@ new ExceptionMessage(),
     ) {
     }
 }
+
+// Issue #3736 - prevent the fixer creating a parse error by removing the function close brace.
+class Test
+{
+    public function __construct(
+        protected int $id
+    )
+    {}
+}
diff --git a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc.fixed b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc.fixed
index f82b5665a5..7d90f9a412 100644
--- a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc.fixed
+++ b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.inc.fixed
@@ -463,3 +463,12 @@ new ExceptionMessage(),
     ) {
     }
 }
+
+// Issue #3736 - prevent the fixer creating a parse error by removing the function close brace.
+class Test
+{
+    public function __construct(
+        protected int $id
+    ) {
+    }
+}
diff --git a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.php b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.php
index 01ab3e8482..519b38e4e6 100644
--- a/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.php
+++ b/src/Standards/PEAR/Tests/Functions/FunctionDeclarationUnitTest.php
@@ -99,6 +99,7 @@ public function getErrorList($testFile='FunctionDeclarationUnitTest.inc')
                 371 => 1,
                 402 => 1,
                 406 => 1,
+                475 => 1,
             ];
         } else {
             $errors = [