diff --git a/src/runtime/src/rtio_clocking.rs b/src/runtime/src/rtio_clocking.rs
index cd279da..a3e2f7b 100644
--- a/src/runtime/src/rtio_clocking.rs
+++ b/src/runtime/src/rtio_clocking.rs
@@ -24,8 +24,9 @@ pub enum RtioClock {
 }
 
 fn get_rtio_clock_cfg(cfg: &Config) -> RtioClock {
+    let mut res = RtioClock::Default;
     if let Ok(clk) = cfg.read_str("rtio_clock") {
-        match clk.as_ref() {
+        res = match clk.as_ref() {
             "int_125" => RtioClock::Int_125,
             "int_100" => RtioClock::Int_100,
             "int_150" => RtioClock::Int_150,
@@ -37,14 +38,18 @@ fn get_rtio_clock_cfg(cfg: &Config) -> RtioClock {
             "ext0_synth0_125to125" => RtioClock::Ext0_Synth0_125to125,
             _ => { 
                 warn!("Unrecognised rtio_clock setting. Falling back to default.");
-                RtioClock::Int_125 
+                RtioClock::Default 
             }
-        }
+        };
     }
     else {
-        info!("error reading configuration. Falling back to default.");
-        RtioClock::Default
+        warn!("error reading configuration. Falling back to default.");
     }
+    if res == RtioClock::Default {
+        warn!("Using default configuration - internal 125MHz RTIO clock.");
+        return RtioClock::Int_125;
+    }
+    res
 }