diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 57ca4a17749..b34c2ad31d2 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4164,13 +4164,15 @@ sub process {
 
 # check for new typedefs, only function parameters and sparse annotations
 # make sense.
-		if ($line =~ /\btypedef\s/ &&
-		    $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
-		    $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
-		    $line !~ /\b$typeTypedefs\b/ &&
-		    $line !~ /\b__bitwise\b/) {
-			WARN("NEW_TYPEDEFS",
-			     "do not add new typedefs\n" . $herecurr);
+		if ($realfile =~ /\/include\/zephyr\/posix\/*.h/) {
+			if ($line =~ /\btypedef\s/ &&
+			$line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
+			$line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
+			$line !~ /\b$typeTypedefs\b/ &&
+			$line !~ /\b__bitwise\b/) {
+				WARN("NEW_TYPEDEFS",
+				"do not add new typedefs\n" . $herecurr);
+			}
 		}
 
 # * goes on variable not on type