diff --git a/tools/testing/selftests/powerpc/benchmarks/null_syscall.c b/tools/testing/selftests/powerpc/benchmarks/null_syscall.c
index ecc14d68e101338a46b55d0f4760932fea6141b5..908de689a902a2bda5438bd3de35d1018f126d03 100644
--- a/tools/testing/selftests/powerpc/benchmarks/null_syscall.c
+++ b/tools/testing/selftests/powerpc/benchmarks/null_syscall.c
@@ -25,7 +25,7 @@ unsigned long long clock_frequency;
 unsigned long long timebase_frequency;
 double timebase_multiplier;
 
-static inline unsigned long long mftb(void)
+static inline unsigned long mftb(void)
 {
 	unsigned long low;