LStack.hpp:: No template named 'LStack'

I have two source files, one is a .h and another .hpp for the implementation of the .h class template the .h has the following code:

'''

#ifndef LSTACK_H
#define LSTACK_H

template <typename T>
class LStack
{
    public:
        LStack();
        ~LStack();
        // Mutator member functions
        void push(const T& entry);
        T pop();
        bool isEmpty() const;
        // Query member functions
        int size() const;
        T& peek(); // sometimes top(), but not in 1120!
    private:
        T data; // LinkedList Member
        int used;
    
};

#include "LStack.hpp" // include the ‘implementation’
    // part of Template
#endif

'''

The .hpp code is below:

'''

#ifndef LSTACK_HPP
#define LSTACK_HPP

template <typename T>
LStack<T>::LStack() {} // default constructor

template <typename T>
LStack<T>::~LStack() {} // needs to handle data member T

template <typename T>
void LStack<T>::push(T& obj)
{
    data.addToHead(obj);
}

template <typename T>
T LStack<T>::pop()
{
    return data.removeFromHead();
}

#endif // LSTACK_HPP

'''

I am getting a Semantic error "LStack.hpp:: No template named 'LStack'" I can't seem to figure out the problem