diff --git a/reactos/drivers/hid/hidparse/hidparse.c b/reactos/drivers/hid/hidparse/hidparse.c
index 0fc78430fb5..6daed49bb56 100644
--- a/reactos/drivers/hid/hidparse/hidparse.c
+++ b/reactos/drivers/hid/hidparse/hidparse.c
@@ -70,7 +70,7 @@ CopyFunction(
 }
 
 VOID
-NTAPI
+__cdecl
 DebugFunction(
     IN LPCSTR FormatStr, ...)
 {
diff --git a/reactos/lib/drivers/hidparser/hidparser.h b/reactos/lib/drivers/hidparser/hidparser.h
index 636fd66c326..581193a319f 100644
--- a/reactos/lib/drivers/hidparser/hidparser.h
+++ b/reactos/lib/drivers/hidparser/hidparser.h
@@ -17,7 +17,7 @@ typedef PVOID (NTAPI *PHIDPARSER_ALLOC_FUNCTION)(ULONG Size);
 typedef VOID (NTAPI *PHIDPARSER_FREE_FUNCTION)(PVOID Item);
 typedef VOID (NTAPI *PHIDPARSER_ZERO_FUNCTION)(PVOID Item, ULONG Size);
 typedef VOID (NTAPI *PHIDPARSER_COPY_FUNCTION)(PVOID Target, PVOID Source, ULONG Size);
-typedef VOID (NTAPI *PHIDPARSER_DEBUG_FUNCTION)(LPCSTR Src, ...);
+typedef VOID (__cdecl *PHIDPARSER_DEBUG_FUNCTION)(LPCSTR Src, ...);
 
 //
 // status code