diff --git a/src/BuildOpt.h b/src/BuildOpt.h
index d376d2e8..76770580 100644
--- a/src/BuildOpt.h
+++ b/src/BuildOpt.h
@@ -746,7 +746,7 @@
     #define RADIOLIB_DIGITAL_PIN_TO_INTERRUPT(p)        digitalPinToInterrupt(p)
     #define RADIOLIB_NC                                 (0xFF)
     #define RADIOLIB_DEFAULT_SPI                        SPI
-    #define RADIOLIB_DEFAULT_SPI_SETTINGS               SPISettings(2000000, MSBFIRST, SPI_MODE0)
+    #define RADIOLIB_DEFAULT_SPI_SETTINGS               SPISettings(1000000, MSBFIRST, SPI_MODE0) // see issue #709
     #define RADIOLIB_NONVOLATILE                        PROGMEM
     #define RADIOLIB_NONVOLATILE_READ_BYTE(addr)        pgm_read_byte(addr)
     #define RADIOLIB_NONVOLATILE_READ_DWORD(addr)       pgm_read_dword(addr)