diff --git a/Processors/TFT_eSPI_STM32.c b/Processors/TFT_eSPI_STM32.c
index daabfa5..1343625 100644
--- a/Processors/TFT_eSPI_STM32.c
+++ b/Processors/TFT_eSPI_STM32.c
@@ -193,6 +193,7 @@ uint8_t TFT_eSPI::readByte(void)
 {
   uint8_t b = 0;
 
+#ifdef TFT_RD
   RD_L;
 #ifdef STM_PORTA_DATA_BUS
   b = GPIOA->IDR;
@@ -211,7 +212,7 @@ uint8_t TFT_eSPI::readByte(void)
   b |= RD_TFT_D4 | RD_TFT_D5 | RD_TFT_D6 | RD_TFT_D7;
 #endif
   RD_H;
-
+#endif // TFT_RD
   return b;
 }
 
diff --git a/TFT_eSPI.cpp b/TFT_eSPI.cpp
index 0252d30..f02bf03 100644
--- a/TFT_eSPI.cpp
+++ b/TFT_eSPI.cpp
@@ -156,10 +156,11 @@ TFT_eSPI::TFT_eSPI(int16_t w, int16_t h)
 
 #if defined (TFT_PARALLEL_8_BIT)
 
+#ifdef TFT_RD
   // Make sure read is high before we set the bus to output
   pinMode(TFT_RD, OUTPUT);
   digitalWrite(TFT_RD, HIGH);
-
+#endif
   // Set TFT data bus lines to output
   pinMode(TFT_D0, OUTPUT); digitalWrite(TFT_D0, HIGH);
   pinMode(TFT_D1, OUTPUT); digitalWrite(TFT_D1, HIGH);