diff --git a/src/fop.rs b/src/fop.rs
index 66b7e82..7c8424e 100644
--- a/src/fop.rs
+++ b/src/fop.rs
@@ -39,7 +39,7 @@ fn main() {
 	let mut d = '\u{1E}'.to_string(); /* ASCII record separator */
 	let mut optind = 1;
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio proc exec");
 		if let Err(e) = pledge(Some(promises), None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
diff --git a/src/hru.rs b/src/hru.rs
index c6009a7..e07ec39 100644
--- a/src/hru.rs
+++ b/src/hru.rs
@@ -86,7 +86,7 @@ fn main() -> ExitCode {
 		return ExitCode::from(EX_USAGE as u8);
 	}
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio");
 		if let Err(e) = pledge(Some(promises), None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
diff --git a/src/intcmp.rs b/src/intcmp.rs
index a7c045d..456f268 100644
--- a/src/intcmp.rs
+++ b/src/intcmp.rs
@@ -42,7 +42,7 @@ fn usage(s: &str) -> ExitCode {
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio");
 		if let Err(e) = pledge(Some(promises), None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
diff --git a/src/mm.rs b/src/mm.rs
index b99bf9e..755c382 100644
--- a/src/mm.rs
+++ b/src/mm.rs
@@ -51,7 +51,7 @@ fn main() -> ExitCode {
 	let argv = args().collect::<Vec<_>>();
 	let usage = format!("Usage: {} [-aetu] [-i input] [-o output]", argv[0]);
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("rpath stdio unveil");
 		if let Err(e) = pledge(Some(promises), None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
@@ -77,7 +77,7 @@ fn main() -> ExitCode {
 			Ok("i") => { /* add inputs */
 				let input = opt.arg().unwrap();
 
-				if cfg!(target_os="openbsd") {
+				#[cfg(target_os="openbsd")] {
 					let perms = UnveilPerms::new(vec!['r']);
 					if let Err(e) = unveil(Some(&input), Some(perms)) {
 						eprintln!("{}: {}", argv[0], e.strerror());
@@ -91,7 +91,7 @@ fn main() -> ExitCode {
 			Ok("o") => { /* add output */
 				let output = opt.arg().unwrap(); 
 
-				if cfg!(target_os="openbsd") {
+				#[cfg(target_os="openbsd")] {
 					let perms = UnveilPerms::new(vec!['w', 'c']);
 					if let Err(e) = unveil(Some(&output), Some(perms)) {
 						eprintln!("{}: {}", argv[0], e.strerror());
@@ -124,7 +124,7 @@ fn main() -> ExitCode {
 		}
 	}
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		if let Err(e) = unveil(None, None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
 			return ExitCode::from(EX_OSERR as u8);
diff --git a/src/rpn.rs b/src/rpn.rs
index e4f725d..7669efb 100644
--- a/src/rpn.rs
+++ b/src/rpn.rs
@@ -198,7 +198,7 @@ fn round_precise(value: &f64, precision: usize) -> f64 {
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
 
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio");
 		if let Err(e) = pledge(Some(promises), None) {
 			eprintln!("{}: {}", argv[0], e.strerror());
diff --git a/src/swab.rs b/src/swab.rs
index 27ce9a5..4dc86de 100644
--- a/src/swab.rs
+++ b/src/swab.rs
@@ -54,7 +54,7 @@ fn usage(s: &str) -> ExitCode {
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
 	
-	if cfg!(target_os="openbsd") {
+	#[cfg(target_os="openbsd")] {
 		let promises = Promises::new("stdio");
 		if let Err(e) = pledge(Some(promises), None) {
 			return oserr(&argv[0], e);