diff --git a/TFT_eSPI.h b/TFT_eSPI.h
index a12c8e4..4757a71 100644
--- a/TFT_eSPI.h
+++ b/TFT_eSPI.h
@@ -731,7 +731,12 @@ class TFT_eSPI : public Print { friend class TFT_eSprite; // Sprite class has ac
            // Alpha blend 2 colours, see generic "alphaBlend_Test" example
            // alpha =   0 = 100% background colour
            // alpha = 255 = 100% foreground colour
+#ifdef STM32
   uint16_t alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc);
+#else
+  inline
+  uint16_t alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc);
+#endif
            // 16 bit colour alphaBlend with alpha dither (dither reduces colour banding)
   uint16_t alphaBlend(uint8_t alpha, uint16_t fgc, uint16_t bgc, uint8_t dither);
            // 24 bit colour alphaBlend with optional alpha dither