diff --git a/vlib/v/pref/should_compile.v b/vlib/v/pref/should_compile.v
index c1ba4c9ba0..2a71c51dfb 100644
--- a/vlib/v/pref/should_compile.v
+++ b/vlib/v/pref/should_compile.v
@@ -6,6 +6,7 @@ pub fn (prefs &Preferences) should_compile_filtered_files(dir string, files_ []s
 	mut res := []string{}
 	mut files := files_.clone()
 	files.sort()
+	mut all_v_files := []string{}
 	for file in files {
 		if !file.ends_with('.v') && !file.ends_with('.vh') {
 			continue
@@ -32,8 +33,65 @@ pub fn (prefs &Preferences) should_compile_filtered_files(dir string, files_ []s
 				continue
 			}
 		}
-		res << os.join_path(dir, file)
+		all_v_files << os.join_path(dir, file)
 	}
+	//
+	mut defaults := []string{}
+	mut fnames_no_postfixes := map[string][]string{}
+	for file in all_v_files {
+		if file.contains('default.c.v') {
+			defaults << file
+		} else {
+			res << file
+			no_postfix_key := fname_without_platform_postfix(file)
+			mut candidates := fnames_no_postfixes[no_postfix_key]
+			candidates << file
+			fnames_no_postfixes[no_postfix_key] = candidates
+		}
+	}
+	for file in defaults {
+		no_postfix_key := fname_without_platform_postfix(file)
+		if no_postfix_key in fnames_no_postfixes {
+			if prefs.is_verbose {
+				println('>>> should_compile_filtered_files: skipping _default.c.v file $file ; the specialized versions are: ${fnames_no_postfixes[no_postfix_key]}')
+			}
+			continue
+		}
+		res << file
+	}
+	if prefs.is_verbose {
+		println('>>> should_compile_filtered_files: res: $res')
+	}
+	return res
+}
+
+fn fname_without_platform_postfix(file string) string {
+	res := file.replace_each([
+		'default.c.v',
+		'_',
+		'nix.c.v',
+		'_',
+		'windows.c.v',
+		'_',
+		'linux.c.v',
+		'_',
+		'darwin.c.v',
+		'_',
+		'macos.c.v',
+		'_',
+		'android.c.v',
+		'_',
+		'freebsd.c.v',
+		'_',
+		'netbsd.c.v',
+		'_',
+		'dragonfly.c.v',
+		'_',
+		'solaris.c.v',
+		'_',
+		'x64.v',
+		'_',
+	])
 	return res
 }