diff --git a/sdk/include/reactos/debug.h b/sdk/include/reactos/debug.h
index ab332fda181..81357acadd6 100644
--- a/sdk/include/reactos/debug.h
+++ b/sdk/include/reactos/debug.h
@@ -66,7 +66,7 @@ RtlAssert(
 
 #ifndef assert
 #if DBG && !defined(NASSERT)
-#define assert(x) if (!(x)) { RtlAssert((PVOID)#x, (PVOID)__RELFILE__, __LINE__, ""); }
+#define assert(x) if (!(x)) { RtlAssert((PVOID)#x, (PVOID)__RELFILE__, __LINE__, (PCHAR)""); }
 #else
 #define assert(x) ((VOID) 0)
 #endif
@@ -74,7 +74,7 @@ RtlAssert(
 
 #ifndef ASSERT
 #if DBG && !defined(NASSERT)
-#define ASSERT(x) if (!(x)) { RtlAssert((PVOID)#x, (PVOID)__RELFILE__, __LINE__, ""); }
+#define ASSERT(x) if (!(x)) { RtlAssert((PVOID)#x, (PVOID)__RELFILE__, __LINE__, (PCHAR)""); }
 #else
 #define ASSERT(x) ((VOID) 0)
 #endif