diff --git a/openrtx/include/core/dsp.h b/openrtx/include/core/dsp.h
index fda797b4..6ec16716 100644
--- a/openrtx/include/core/dsp.h
+++ b/openrtx/include/core/dsp.h
@@ -73,15 +73,6 @@ static inline void dsp_removeDcOffset(struct dcBlock *dcb, int16_t *buffer,
         buffer[i] = dsp_dcBlockFilter(dcb, buffer[i]);
 }
 
-/*
- * Inverts the phase of the audio buffer passed as paramenter.
- * The buffer will be processed in place to save memory.
- *
- * @param buffer: the buffer to be used as both source and destination.
- * @param length: the length of the input buffer.
- */
-void dsp_invertPhase(audio_sample_t *buffer, uint16_t length);
-
 #ifdef __cplusplus
 }
 #endif // __cplusplus
diff --git a/openrtx/src/core/dsp.cpp b/openrtx/src/core/dsp.cpp
index 5f36684c..ec1ba09f 100644
--- a/openrtx/src/core/dsp.cpp
+++ b/openrtx/src/core/dsp.cpp
@@ -37,11 +37,3 @@ int16_t dsp_dcBlockFilter(struct dcBlock *dcb, int16_t sample)
 
     return static_cast<int16_t>(dcb->prevOut);
 }
-
-void dsp_invertPhase(audio_sample_t *buffer, uint16_t length)
-{
-    for(uint16_t i = 0; i < length; i++)
-    {
-        buffer[i] = -buffer[i];
-    }
-}