diff --git a/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c b/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
index 00648ec4a6..11b76aa658 100644
--- a/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
+++ b/c/src/lib/libbsp/arm/lpc24xx/misc/system-clocks.c
@@ -68,7 +68,7 @@ void lpc24xx_micro_seconds_delay(unsigned us)
 
   do {
     elapsed = lpc24xx_timer() - start;
-  } while (elapsed <= delay);
+  } while (elapsed < delay);
 }
 
 unsigned lpc24xx_pllclk(void)