diff --git a/src/subcommands/fire.rs b/src/subcommands/fire.rs
index 446c975a..9cdbfa9d 100644
--- a/src/subcommands/fire.rs
+++ b/src/subcommands/fire.rs
@@ -72,20 +72,25 @@ pub fn add_fire_to_bam(fire_opts: &mut FireOptions) -> Result<(), anyhow::Error>
                 let n_msps = rec.msp.annotations.len();
                 if fire_opts.skip_no_m6a || fire_opts.min_msp > 0 || fire_opts.min_ave_msp_size > 0
                 {
-                    // skip no calls
-                    if rec.m6a.annotations.is_empty() || n_msps == 0 {
+                    // skip reads with no m6a calls
+                    if fire_opts.skip_no_m6a && rec.m6a.annotations.is_empty() {
                         skip_because_no_m6a += 1;
                         continue;
                     }
-                    //let max_msp_len = *rec.msp.lengths.iter().flatten().max().unwrap_or(&0);
                     if n_msps < fire_opts.min_msp {
                         skip_because_num_msp += 1;
                         continue;
                     }
-                    let ave_msp_size = rec.msp.lengths().iter().sum::<i64>() / n_msps as i64;
-                    if ave_msp_size < fire_opts.min_ave_msp_size {
-                        skip_because_ave_msp_length += 1;
-                        continue;
+                    if fire_opts.min_ave_msp_size > 0 {
+                        if n_msps == 0 {
+                            skip_because_ave_msp_length += 1;
+                            continue;
+                        }
+                        let ave_msp_size = rec.msp.lengths().iter().sum::<i64>() / n_msps as i64;
+                        if ave_msp_size < fire_opts.min_ave_msp_size {
+                            skip_because_ave_msp_length += 1;
+                            continue;
+                        }
                     }
                 }
                 out.write(&rec.record)?;