diff --git a/test/zdtm/lib/arch/ppc64/include/asm/atomic.h b/test/zdtm/lib/arch/ppc64/include/asm/atomic.h
index 94630062f..bd14cc059 100644
--- a/test/zdtm/lib/arch/ppc64/include/asm/atomic.h
+++ b/test/zdtm/lib/arch/ppc64/include/asm/atomic.h
@@ -47,7 +47,7 @@ ATOMIC_OP(sub, subf)
 
 #undef ATOMIC_OP
 
-static __inline__ int atomic_inc(atomic_t *v)
+static __inline__ int atomic_inc_return(atomic_t *v)
 {
 	int t;
 
@@ -65,6 +65,11 @@ static __inline__ int atomic_inc(atomic_t *v)
 	return t;
 }
 
+static __inline__ int atomic_inc(atomic_t *v)
+{
+	return atomic_inc_return(v) - 1;
+}
+
 static __inline__ void atomic_dec(atomic_t *v)
 {
 	int t;