diff --git a/TFT_eSPI.cpp b/TFT_eSPI.cpp
index 67bd87e..22915ff 100644
--- a/TFT_eSPI.cpp
+++ b/TFT_eSPI.cpp
@@ -4971,7 +4971,10 @@ uint16_t TFT_eSPI::decodeUTF8(uint8_t *buf, uint16_t *index, uint16_t remaining)
 ** Function name:           alphaBlend
 ** Description:             Blend 16bit foreground and background
 *************************************************************************************x*/
-inline uint16_t TFT_eSPI::alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc)
+#ifndef STM32
+inline 
+#endif
+uint16_t TFT_eSPI::alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc)
 {
   // Split out and blend 5 bit red and blue channels
   uint32_t rxb = bgc & 0xF81F;