diff --git a/libcpu/arm/cortex-m33/context_gcc.S b/libcpu/arm/cortex-m33/context_gcc.S
index 3c7dcfa3d7f72088ec9e0a2cee52ce36d60b62c9..18e97c631ed4118e33c6702ed632274b11310f3e 100644
--- a/libcpu/arm/cortex-m33/context_gcc.S
+++ b/libcpu/arm/cortex-m33/context_gcc.S
@@ -98,7 +98,7 @@ PendSV_Handler:
     MSR     PRIMASK, r2                             /* if r1 == 0x00, do msr PRIMASK, r2 */
     BX      lr                                      /* if r1 == 0x00, do bx lr */
 
-schedule
+schedule:
     PUSH    {r2}                                    /* store interrupt state */
 
     /* clear rt_thread_switch_interrupt_flag to 0 */