diff --git a/reactos/include/ddk/winddk.h b/reactos/include/ddk/winddk.h
index 650f9d93241..f370c6c1144 100644
--- a/reactos/include/ddk/winddk.h
+++ b/reactos/include/ddk/winddk.h
@@ -10450,7 +10450,7 @@ DbgBreakPointWithStatus(
 ULONG
 __cdecl
 DbgPrint(
-  IN PCCH  Format,
+  IN PCCHAR  Format,
   IN ...);
 
 ULONG
@@ -10458,7 +10458,7 @@ __cdecl
 DbgPrintEx(
   IN ULONG  ComponentId,
   IN ULONG  Level,
-  IN PCCH  Format,
+  IN PCCHAR  Format,
   IN ...);
 
 NTOSAPI
diff --git a/reactos/include/ndk/rtlfuncs.h b/reactos/include/ndk/rtlfuncs.h
index ec76c604720..7fd28cbfd3f 100644
--- a/reactos/include/ndk/rtlfuncs.h
+++ b/reactos/include/ndk/rtlfuncs.h
@@ -2454,7 +2454,7 @@ RtlFreeRangeList(IN PRTL_RANGE_LIST RangeList);
 ULONG
 __cdecl
 DbgPrint(
-    IN PCCH  Format,
+    IN PCCHAR  Format,
     IN ...
 );
 
@@ -2464,7 +2464,7 @@ __cdecl
 DbgPrintEx(
     IN ULONG ComponentId,
     IN ULONG Level,
-    IN PCCH Format,
+    IN PCCHAR Format,
     IN ...
 );
 
diff --git a/reactos/include/reactos/debug.h b/reactos/include/reactos/debug.h
index 297edefe851..13beaef0c6b 100644
--- a/reactos/include/reactos/debug.h
+++ b/reactos/include/reactos/debug.h
@@ -29,7 +29,7 @@
 ULONG
 __cdecl
 DbgPrint(
-    IN PCCH  Format,
+    IN PCCHAR  Format,
     IN ...
 );