diff --git a/src/main.rs b/src/main.rs
index b1952b3..51064ca 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -146,6 +146,7 @@ fn send_message(msg: &KakMessage) -> Result<(), Box<dyn std::error::Error>> {
         if let Some(debug_msg_str) = &msg.1 {
             write!(f, "echo -debug '{}';", debug_msg_str.replace('\'', "''"))?;
         }
+        f.flush()?;
     }
     Ok(())
 }
@@ -169,7 +170,8 @@ fn run() -> Result<KakMessage, KakMessage> {
 pub fn kak_exec(cmd: &str) -> Result<(), KakMessage> {
     let mut f = open_command_fifo()?;
 
-    write!(f, "{}", cmd).map_err(Into::into)
+    write!(f, "{}", cmd)?;
+    f.flush().map_err(Into::into)
 }
 
 pub fn kak_response(msg: &str) -> Result<Vec<String>, KakMessage> {
diff --git a/src/math_eval.rs b/src/math_eval.rs
index 7d27602..6299f0f 100644
--- a/src/math_eval.rs
+++ b/src/math_eval.rs
@@ -36,6 +36,7 @@ pub fn math_eval(_options: &Options) -> Result<KakMessage, KakMessage> {
         write!(f, " '{}'", new_selection.as_deref().unwrap_or(""))?;
     }
     write!(f, " ; exec R;")?;
+    f.flush()?;
 
     Ok(KakMessage(
         format!("MathEval {} selections", selections.len()),
diff --git a/src/shuf.rs b/src/shuf.rs
index 181b2f6..7286546 100644
--- a/src/shuf.rs
+++ b/src/shuf.rs
@@ -17,6 +17,7 @@ pub fn shuf(_options: &Options) -> Result<KakMessage, KakMessage> {
         write!(f, " '{}'", new_selection)?;
     }
     write!(f, " ; exec R;")?;
+    f.flush()?;
 
     Ok(KakMessage(
         format!("Shuf {} selections", selections.len()),
diff --git a/src/sort.rs b/src/sort.rs
index ebecbb6..d2db957 100644
--- a/src/sort.rs
+++ b/src/sort.rs
@@ -190,6 +190,7 @@ pub fn sort(options: &Options) -> Result<KakMessage, KakMessage> {
         write!(f, " '{}'", new_selection)?;
     }
     write!(f, " ; exec R;")?;
+    f.flush()?;
 
     Ok(KakMessage(
         format!("Sorted {} selections", zipped.len()),
diff --git a/src/uniq.rs b/src/uniq.rs
index c77f5b6..384ad30 100644
--- a/src/uniq.rs
+++ b/src/uniq.rs
@@ -47,6 +47,7 @@ pub fn uniq(options: &Options) -> Result<KakMessage, KakMessage> {
         write!(f, " '{}'", new_selection)?;
     }
     write!(f, " ; exec R;")?;
+    f.flush()?;
 
     Ok(KakMessage(
         format!("Uniq {} selections", selections.len()),