diff --git a/matlab/include/matrix.h b/matlab/include/matrix.h
index 243bb1d..8b18a79 100644
--- a/matlab/include/matrix.h
+++ b/matlab/include/matrix.h
@@ -94,5 +94,6 @@ void mx_Export mxSetField(mxArray *, mwIndex, const char *, mxArray *);
 void mx_Export mxSetProperty(mxArray *, mwIndex, const char *, const mxArray *);
 void mx_Export mxSetFieldByNumber(mxArray *, mwIndex, int, mxArray *);
 mxArray* mx_Export mxCreateCharArray(mwSize, const mwSize *);
+maxArray mex_Export *mxDuplicateArray(const mxArray *);
 
 #endif // matrix_H
diff --git a/matlab/src/mex.cpp b/matlab/src/mex.cpp
index e7c8dd8..c6cc852 100644
--- a/matlab/src/mex.cpp
+++ b/matlab/src/mex.cpp
@@ -9,4 +9,5 @@ int mex_Export mexPrintf(const char*, ...) { return 0; }
 void mex_Export mexLock(void) {}
 int mex_Export mexAtExit(void (*)(void)) { return 0; }
 int mex_Export mexEvalString(const char *) { return 0; }
-void mex_Export mexMakeArrayPersistent(mxArray *) {}
\ No newline at end of file
+void mex_Export mexMakeArrayPersistent(mxArray *) {}
+maxArray mex_Export *mxDuplicateArray(const mxArray *) { return 0; }
\ No newline at end of file