diff --git a/Adafruit_RA8875.cpp b/Adafruit_RA8875.cpp
index e1a4960..b9cb947 100644
--- a/Adafruit_RA8875.cpp
+++ b/Adafruit_RA8875.cpp
@@ -361,7 +361,13 @@ void Adafruit_RA8875::textWrite(char* buffer, uint16_t len)
   for (uint16_t i=0;i<len;i++)
   {
     writeData(buffer[i]);
+#if defined(__AVR__)
     if (_textScale > 1) delay(1);
+#elif defined(__arm__)
+    // This delay is needed with textEnlarge(1) because
+    // Teensy 3.X is much faster than Arduino Uno
+    if (_textScale > 0) delay(1);
+#endif
   }
 }
 
diff --git a/Adafruit_RA8875.h b/Adafruit_RA8875.h
index e7fa744..1c0953f 100644
--- a/Adafruit_RA8875.h
+++ b/Adafruit_RA8875.h
@@ -37,6 +37,9 @@
 
 #include <Adafruit_GFX.h>
 
+#ifndef _ADAFRUIT_RA8875_H
+#define _ADAFRUIT_RA8875_H
+
 // Sizes!
 enum RA8875sizes { RA8875_480x272, RA8875_800x480 };
 
@@ -343,3 +346,5 @@ class Adafruit_RA8875 : public Adafruit_GFX {
 #define RA8875_INTC2_DMA        0x08
 #define RA8875_INTC2_TP         0x04
 #define RA8875_INTC2_BTE        0x02
+
+#endif