diff --git a/modules/hamsandwich/hook.h b/modules/hamsandwich/hook.h
index 4024bdea..744d69be 100644
--- a/modules/hamsandwich/hook.h
+++ b/modules/hamsandwich/hook.h
@@ -39,7 +39,7 @@ public:
 	char			*ent;     // ent name that's being hooked
 	int              trampSize;
 
-	Hook(void **vtable_, int entry_, void *target_, bool voidcall, bool retbuf, int paramcount, char *name) :
+	Hook(void **vtable_, int entry_, void *target_, bool voidcall, bool retbuf, int paramcount, const char *name) :
 		func(NULL), vtable(vtable_), entry(entry_), target(target_), exec(0), del(0), tramp(NULL), trampSize(0)
 		{
 			// original function is vtable[entry]
diff --git a/modules/hamsandwich/hook_native.cpp b/modules/hamsandwich/hook_native.cpp
index 42a8ed87..c88c364f 100644
--- a/modules/hamsandwich/hook_native.cpp
+++ b/modules/hamsandwich/hook_native.cpp
@@ -534,21 +534,24 @@ static cell AMX_NATIVE_CALL RegisterHam(AMX *amx, cell *params)
 
 	CHECK_FUNCTION(func);
 
-	char *function=MF_GetAmxString(amx, params[3], 0, NULL);
-	char *classname=MF_GetAmxString(amx, params[2], 1, NULL);
-	
+	// Fixes a buffer issue by copying locally the strings.
+	// REMOVE_ENTITY invokes pfnOnFreeEntPrivateData which plugins can hook and `function` and `classname` strings are used after that
+	// but it is pointing to the AMXX static buffer. Basically, hooking this forward and doing stuff inside could invalid all RegisterHam calls.
+	ke::AString function(MF_GetAmxString(amx, params[3], 0, NULL));
+	ke::AString classname(MF_GetAmxString(amx, params[2], 1, NULL));
+
 	// Check the entity
 
 	// create an entity, assign it the gamedll's class, hook it and destroy it
 	edict_t *Entity=CREATE_ENTITY();
 
-	CALL_GAME_ENTITY(PLID,classname,&Entity->v);
+	CALL_GAME_ENTITY(PLID,classname.chars(),&Entity->v);
 
 	if (Entity->pvPrivateData == NULL)
 	{
 		REMOVE_ENTITY(Entity);
 
-		MF_LogError(amx, AMX_ERR_NATIVE,"Failed to retrieve classtype for \"%s\", hook for \"%s\" not active.",classname,function);
+		MF_LogError(amx, AMX_ERR_NATIVE,"Failed to retrieve classtype for \"%s\", hook for \"%s\" not active.",classname.chars(),function.chars());
 
 		return 0;
 	}
@@ -558,18 +561,18 @@ static cell AMX_NATIVE_CALL RegisterHam(AMX *amx, cell *params)
 
 	if (vtable == NULL)
 	{
-		MF_LogError(amx, AMX_ERR_NATIVE,"Failed to retrieve vtable for \"%s\", hook for \"%s\" not active.",classname,function);
+		MF_LogError(amx, AMX_ERR_NATIVE,"Failed to retrieve vtable for \"%s\", hook for \"%s\" not active.",classname.chars(),function.chars());
 
 		return 0;
 	}
 
 	// Verify that the function is valid
 	// Don't fail the plugin if this fails, just emit a normal error
-	int fwd=hooklist[func].makefunc(amx, function);
+	int fwd=hooklist[func].makefunc(amx, function.chars());
 
 	if (fwd == -1)
 	{
-		MF_LogError(amx, AMX_ERR_NATIVE, "Function %s not found.", function);
+		MF_LogError(amx, AMX_ERR_NATIVE, "Function %s not found.", function.chars());
 
 		return 0;
 	}
@@ -586,9 +589,9 @@ static cell AMX_NATIVE_CALL RegisterHam(AMX *amx, cell *params)
 	pfwd->AddRef();
 
 	// We've passed all tests...
-	if (strcmp(classname, "player") == 0 && enableSpecialBot)
+	if (strcmp(classname.chars(), "player") == 0 && enableSpecialBot)
 	{
-		SpecialbotHandler.RegisterHamSpecialBot(amx, func, function, post, pfwd);
+		SpecialbotHandler.RegisterHamSpecialBot(amx, func, function.chars(), post, pfwd);
 	}
 
 	int **ivtable=(int **)vtable;
@@ -615,7 +618,7 @@ static cell AMX_NATIVE_CALL RegisterHam(AMX *amx, cell *params)
 	}
 
 	// If we got here, the function is not hooked
-	Hook *hook = new Hook(vtable, hooklist[func].vtid, hooklist[func].targetfunc, hooklist[func].isvoid, hooklist[func].needsretbuf, hooklist[func].paramcount, classname);
+	Hook *hook = new Hook(vtable, hooklist[func].vtid, hooklist[func].targetfunc, hooklist[func].isvoid, hooklist[func].needsretbuf, hooklist[func].paramcount, classname.chars());
 	hooks[func].append(hook);
 
 	if (post)