diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c
index b0d3876c96ab..94a2e9d21f58 100644
--- a/kernel/trace/trace_events_synth.c
+++ b/kernel/trace/trace_events_synth.c
@@ -473,7 +473,7 @@ static unsigned int trace_string(struct synth_trace_event *entry,
 
 #ifdef CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
 		if ((unsigned long)str_val < TASK_SIZE)
-			ret = strncpy_from_user_nofault(str_field, str_val, STR_VAR_LEN_MAX);
+			ret = strncpy_from_user_nofault(str_field, (const void __user *)str_val, STR_VAR_LEN_MAX);
 		else
 #endif
 			ret = strncpy_from_kernel_nofault(str_field, str_val, STR_VAR_LEN_MAX);