diff --git a/lib/Unishox-1.0-shadinger/src/unishox.cpp b/lib/Unishox-1.0-shadinger/src/unishox.cpp
index 050d9338c..72c9d3915 100644
--- a/lib/Unishox-1.0-shadinger/src/unishox.cpp
+++ b/lib/Unishox-1.0-shadinger/src/unishox.cpp
@@ -51,12 +51,9 @@
 #include <ctype.h>
 #include <stdint.h>
 
+#include <pgmspace.h>
 #include "unishox.h"
 
-#ifndef PROGMEM  // quick fix for ESP32 compilation
-#define PROGMEM
-#endif
-
 typedef unsigned char byte;
 // we squeeze both c_95[] and l_95[] in a sinle array.
 // c_95[] uses only the 3 upper nibbles (or 12 most signifcant bits), while the last nibble encodes length (3..13)