diff --git a/reactos/lib/intrlck/decrement.c b/reactos/lib/intrlck/decrement.c
index 44e2865f401..acdd31282ad 100644
--- a/reactos/lib/intrlck/decrement.c
+++ b/reactos/lib/intrlck/decrement.c
@@ -21,10 +21,5 @@ LONG NTAPI
 InterlockedDecrement(
 	LPLONG lpAddend)
 {
-	LONG ret;
-
-	ret = *lpAddend;
-	ret = InterlockedExchangeAdd( lpAddend, ret - 1 );
-
-	return ret;
+	return InterlockedExchangeAdd( lpAddend, -1 ) - 1;
 }
diff --git a/reactos/lib/intrlck/increment.c b/reactos/lib/intrlck/increment.c
index 62d3b9f62de..08567c6693d 100644
--- a/reactos/lib/intrlck/increment.c
+++ b/reactos/lib/intrlck/increment.c
@@ -19,12 +19,7 @@
 
 LONG NTAPI
 InterlockedIncrement(
-	PLONG Addend)
+	LPLONG lpAddend)
 {
-	LONG ret;
-
-	ret = *Addend;
-	ret = InterlockedExchangeAdd( Addend, ret + 1 );
-
-	return ret;
+	return InterlockedExchangeAdd( lpAddend, 1 ) + 1;
 }