diff --git a/extensions/bintools/CallWrapper.cpp b/extensions/bintools/CallWrapper.cpp
index 50150861..56b22da4 100644
--- a/extensions/bintools/CallWrapper.cpp
+++ b/extensions/bintools/CallWrapper.cpp
@@ -180,7 +180,7 @@ const SourceHook::PassInfo * CallWrapper::GetSHParamInfo(unsigned int num)
 
 unsigned int CallWrapper::GetParamOffset(unsigned int num)
 {
-	assert(num <= GetParamCount() && num > 0);
+	assert(num < GetParamCount() && num >= 0);
 
 	return m_Params[num].offset;
 }