diff --git a/src/corelibs/spi/test_spi_connected2_masterpingpong.cpp b/src/corelibs/spi/test_spi_connected2_masterpingpong.cpp
index 06d8e42..1ee6fac 100644
--- a/src/corelibs/spi/test_spi_connected2_masterpingpong.cpp
+++ b/src/corelibs/spi/test_spi_connected2_masterpingpong.cpp
@@ -18,9 +18,9 @@
 
 // project includes
 #include <SPI.h>
-#ifndef SPI_TRANSFER_DELAY
-#define SPI_TRANSFER_DELAY 500
-#else
+#ifndef SPI_TRANSFER_DELAY_US
+#define SPI_TRANSFER_DELAY_US 500
+#endif
 const uint8_t MAX_BUFFER_SIZE = 20;
 const uint8_t MAX_TEST_ITERATION = 10;