diff --git a/src/libsha1/libsha1.c b/src/libsha1/libsha1.c
index 7ff3846..fcf01c5 100644
--- a/src/libsha1/libsha1.c
+++ b/src/libsha1/libsha1.c
@@ -18,7 +18,7 @@ A million repetitions of "a"
 /* #define LITTLE_ENDIAN * This should be #define'd already, if true. */
 /* #define SHA1HANDSOFF * Copies data before messing with it. */
 
-#ifndef ESP8266
+#if !defined(ESP8266) && !defined(ESP32)
 
 #define SHA1HANDSOFF
 
diff --git a/src/libsha1/libsha1.h b/src/libsha1/libsha1.h
index 1f08d0e..40afa61 100644
--- a/src/libsha1/libsha1.h
+++ b/src/libsha1/libsha1.h
@@ -5,7 +5,7 @@ By Steve Reid <steve@edmweb.com>
 100% Public Domain
 */
 
-#ifndef ESP8266
+#if !defined(ESP8266) && !defined(ESP32)
 
 typedef struct {
     uint32_t state[5];
@@ -18,4 +18,4 @@ void SHA1Init(SHA1_CTX* context);
 void SHA1Update(SHA1_CTX* context, const unsigned char* data, uint32_t len);
 void SHA1Final(unsigned char digest[20], SHA1_CTX* context);
 
-#endif
\ No newline at end of file
+#endif