diff --git a/src/handlers/ar.rs b/src/handlers/ar.rs
index cc0bfed..17f3dc5 100644
--- a/src/handlers/ar.rs
+++ b/src/handlers/ar.rs
@@ -59,7 +59,7 @@ impl super::Processor for Ar {
 
     fn process(&self, input_path: &Path) -> Result<super::ProcessResult> {
         let mut have_mod = false;
-        let (mut io, mut input) = InputOutputHelper::open(input_path, self.config.check)?;
+        let (mut io, mut input) = InputOutputHelper::open(input_path, self.config.check, true)?;
 
         let mut buf = [0; MAGIC.len()];
         input.read_exact(&mut buf)?;
diff --git a/src/handlers/jar.rs b/src/handlers/jar.rs
index f69af42..3b0f86a 100644
--- a/src/handlers/jar.rs
+++ b/src/handlers/jar.rs
@@ -34,7 +34,7 @@ impl super::Processor for Jar {
 
     fn process(&self, input_path: &Path) -> Result<super::ProcessResult> {
         let mut have_mod = false;
-        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check)?;
+        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check, true)?;
         let mut input = zip::ZipArchive::new(input)?;
 
         io.open_output()?;
diff --git a/src/handlers/javadoc.rs b/src/handlers/javadoc.rs
index 31d9e7c..59b5718 100644
--- a/src/handlers/javadoc.rs
+++ b/src/handlers/javadoc.rs
@@ -85,7 +85,7 @@ impl super::Processor for Javadoc {
         let mut have_mod = false;
         let mut after_header = false;
 
-        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check)?;
+        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check, true)?;
 
         io.open_output()?;
         let mut output = BufWriter::new(io.output.as_mut().unwrap());
diff --git a/src/handlers/mod.rs b/src/handlers/mod.rs
index 6bff690..2875d1b 100644
--- a/src/handlers/mod.rs
+++ b/src/handlers/mod.rs
@@ -6,7 +6,7 @@ pub mod javadoc;
 pub mod pyc;
 
 use anyhow::{bail, Context, Result};
-use log::{debug, info, warn};
+use log::{log, debug, info, warn, Level};
 use serde::{Serialize, Deserialize};
 use std::ascii::escape_default;
 use std::collections::HashMap;
@@ -371,6 +371,7 @@ pub struct InputOutputHelper<'a> {
     pub output: Option<File>,
 
     pub check: bool,
+    pub verbose: bool,  // include logging about each modified file
 }
 
 impl<'a> Drop for InputOutputHelper<'a> {
@@ -396,7 +397,11 @@ fn unwrap_os_string(filename: &OsStr) -> Result<&str> {
 }
 
 impl<'a> InputOutputHelper<'a> {
-    pub fn open(input_path: &'a Path, check: bool) -> Result<(Self, BufReader<File>)> {
+    pub fn open(
+        input_path: &'a Path,
+        check: bool,
+        verbose: bool,
+    ) -> Result<(Self, BufReader<File>)> {
 
         let input = File::open(input_path)
             .with_context(|| format!("Cannot open {:?}", input_path))?;
@@ -410,6 +415,7 @@ impl<'a> InputOutputHelper<'a> {
             output_path: None,
             output: None,
             check,
+            verbose,
         };
 
         Ok((io, input))
@@ -435,7 +441,7 @@ impl<'a> InputOutputHelper<'a> {
                     bail!("{}: cannot open temporary file: {}", output_path.display(), e);
                 }
 
-                debug!("{}: stale temporary file found, removing", output_path.display());
+                info!("{}: stale temporary file found, removing", output_path.display());
                 fs::remove_file(&output_path)?;
                 openopts.open(&output_path)?
             }
@@ -474,7 +480,8 @@ impl<'a> InputOutputHelper<'a> {
             // If it has multiple links, we reopen the orignal file and rewrite it.
             // This way the inode number is retained and hard links are not broken.
             if meta.nlink() == 1 {
-                info!("{}: replacing with normalized version", self.input_path.display());
+                log!(if self.verbose { Level::Info } else { Level::Debug },
+                     "{}: replacing with normalized version", self.input_path.display());
 
                 if !self.check {
                     output.set_permissions(meta.permissions())?;
@@ -495,7 +502,8 @@ impl<'a> InputOutputHelper<'a> {
                 Ok(ProcessResult::Replaced)
 
             } else {
-                info!("{}: rewriting with normalized contents", self.input_path.display());
+                log!(if self.verbose { Level::Info } else { Level::Debug },
+                     "{}: rewriting with normalized contents", self.input_path.display());
 
                 if !self.check {
                     output.seek(io::SeekFrom::Start(0))?;
diff --git a/src/handlers/pyc.rs b/src/handlers/pyc.rs
index a6d6a87..fb70535 100644
--- a/src/handlers/pyc.rs
+++ b/src/handlers/pyc.rs
@@ -779,7 +779,7 @@ impl super::Processor for Pyc {
     }
 
     fn process(&self, input_path: &Path) -> Result<super::ProcessResult> {
-        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check)?;
+        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check, true)?;
 
         let mut parser = PycParser::from_file(input_path, input)?;
         if parser.version < (3, 0) {
@@ -852,7 +852,7 @@ impl super::Processor for PycZeroMtime {
     }
 
     fn process(&self, input_path: &Path) -> Result<super::ProcessResult> {
-        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check)?;
+        let (mut io, input) = InputOutputHelper::open(input_path, self.config.check, false)?;
 
         let mut parser = PycParser::from_file(input_path, input)?;
         let have_mod = parser.set_zero_mtime()?;
diff --git a/tests/test_handlers/mod.rs b/tests/test_handlers/mod.rs
index c21b538..4f9ea6a 100644
--- a/tests/test_handlers/mod.rs
+++ b/tests/test_handlers/mod.rs
@@ -52,7 +52,7 @@ impl handlers::Processor for Trivial {
 fn test_input_output_helper_drop() {
     let (_dir, input) = prepare_dir("tests/cases/libempty.a").unwrap();
 
-    let (mut helper, _) = handlers::InputOutputHelper::open(&*input, false).unwrap();
+    let (mut helper, _) = handlers::InputOutputHelper::open(&*input, false, false).unwrap();
     helper.open_output().unwrap();
 
     let output_path = helper.output_path.as_ref().unwrap().clone();