diff --git a/src/SoftwareSerial.cpp b/src/SoftwareSerial.cpp
index 23e40b6..163e3a3 100644
--- a/src/SoftwareSerial.cpp
+++ b/src/SoftwareSerial.cpp
@@ -102,7 +102,7 @@ void UARTBase::beginRx(bool hasPullUp, int bufCapacity, int isrBufCapacity) {
         m_parityBuffer.reset(new circular_queue<uint8_t>((m_buffer->capacity() + 7) / 8));
         m_parityInPos = m_parityOutPos = 1;
     }
-    m_isrBuffer.reset(new circular_queue_mp<uint32_t, UARTBase*>((isrBufCapacity > 0) ?
+    m_isrBuffer.reset(new circular_queue<uint32_t, UARTBase*>((isrBufCapacity > 0) ?
         isrBufCapacity : m_buffer->capacity() * (2 + m_dataBits + static_cast<bool>(m_parityMode))));
     if (m_buffer && (!m_parityMode || m_parityBuffer) && m_isrBuffer) {
         m_rxValid = true;
@@ -616,8 +616,4 @@ template void IRAM_ATTR delegate::detail::DelegateImpl<void*, void>::operator()(
 template size_t IRAM_ATTR circular_queue<uint32_t, UARTBase*>::available() const;
 template bool IRAM_ATTR circular_queue<uint32_t, UARTBase*>::push(uint32_t&&);
 template bool IRAM_ATTR circular_queue<uint32_t, UARTBase*>::push(const uint32_t&);
-template size_t IRAM_ATTR circular_queue_mp<uint32_t, UARTBase*>::available() const;
-template bool IRAM_ATTR circular_queue_mp<uint32_t, UARTBase*>::push(uint32_t&&);
-template bool IRAM_ATTR circular_queue_mp<uint32_t, UARTBase*>::push(const uint32_t&);
-
 
diff --git a/src/SoftwareSerial.h b/src/SoftwareSerial.h
index 6e7e13a..9139e2b 100644
--- a/src/SoftwareSerial.h
+++ b/src/SoftwareSerial.h
@@ -22,7 +22,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #ifndef __SoftwareSerial_h
 #define __SoftwareSerial_h
 
-#include "circular_queue/circular_queue_mp.h"
+#include "circular_queue/circular_queue.h"
 #include <Stream.h>
 
 namespace EspSoftwareSerial {
@@ -365,7 +365,7 @@ class UARTBase : public Stream {
 #endif
     // the ISR stores the relative bit times in the buffer. The inversion corrected level is used as sign bit (2's complement):
     // 1 = positive including 0, 0 = negative.
-    std::unique_ptr<circular_queue_mp<uint32_t, UARTBase*> > m_isrBuffer;
+    std::unique_ptr<circular_queue<uint32_t, UARTBase*> > m_isrBuffer;
     const Delegate<void(uint32_t&&), UARTBase*> m_isrBufferForEachDel { [](UARTBase* self, uint32_t&& isrTick) { self->rxBits(isrTick); }, this };
     std::atomic<bool> m_isrOverflow { false };
     uint32_t m_isrLastTick;
@@ -442,9 +442,6 @@ extern template void delegate::detail::DelegateImpl<void*, void>::operator()() c
 extern template size_t circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::available() const;
 extern template bool circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::push(uint32_t&&);
 extern template bool circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::push(const uint32_t&);
-extern template size_t circular_queue_mp<uint32_t, EspSoftwareSerial::UARTBase*>::available() const;
-extern template bool circular_queue_mp<uint32_t, EspSoftwareSerial::UARTBase*>::push(uint32_t&&);
-extern template bool circular_queue_mp<uint32_t, EspSoftwareSerial::UARTBase*>::push(const uint32_t&);
 
 #endif // __SoftwareSerial_h