diff --git a/src/function_manager.rs b/src/function_manager.rs
index eadfaf2..636e705 100644
--- a/src/function_manager.rs
+++ b/src/function_manager.rs
@@ -226,8 +226,10 @@ impl FunctionManager {
 
 	/// Create and push new empty function entry
 	pub fn push_empty(&mut self) {
-		self.functions
-			.push((Id::new_from_u64(random_u64()), FunctionEntry::EMPTY));
+		self.functions.push((
+			Id::new_from_u64(random_u64().expect("unable to generate random id")),
+			FunctionEntry::EMPTY,
+		));
 	}
 
 	/// Detect if any functions are using integrals
diff --git a/src/misc.rs b/src/misc.rs
index b23e837..8a4ff1d 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -180,8 +180,8 @@ pub const fn hashed_storage_read(data: &str) -> Option<(HashBytes, &[u8])> {
 	))
 }
 
-pub fn random_u64() -> u64 {
-	let mut data: [u8; 8] = [0, 0, 0, 0, 0, 0, 0, 0];
-	getrandom(&mut data).expect("unable to generate random number");
-	u64::from_be_bytes(data)
+pub fn random_u64() -> Result<u64, getrandom::Error> {
+	let mut buf = [0u8; 8];
+	getrandom(&mut buf)?;
+	Ok(u64::from_be_bytes(buf))
 }