diff --git a/src/SSD1306.cpp b/src/SSD1306.cpp
index 8f20f1a..8db861c 100644
--- a/src/SSD1306.cpp
+++ b/src/SSD1306.cpp
@@ -27,7 +27,7 @@ extern "C"
 
 unsigned char frame[SSD1306_128x64_BYTES];
 
-SSD1306::SSD1306(int BSCMaster, u8 address, int flip, int type)
+SSD1306::SSD1306(int BSCMaster, u8 address, int flip, LCD_MODEL type)
 	: BSCMaster(BSCMaster)
 	, address(address)
 	, type(type)
@@ -61,7 +61,10 @@ void SSD1306::InitHardware()
 	}
 
 	SendCommand(SSD1306_CMD_SET_COM_PINS);	// 0xDA Layout and direction
-	SendCommand(0x12);
+	if (type == LCD_1306_128x32)
+		SendCommand(0x02);
+	else
+		SendCommand(0x12);
 
 	SetContrast(GetContrast());
 
@@ -86,7 +89,7 @@ void SSD1306::InitHardware()
 
 	Home();
 
-	if (type != 1106)
+	if (type != LCD_1106_128x64)
 		SendCommand(SSD1306_CMD_DEACTIVATE_SCROLL);	// 0x2E
 }
 
@@ -120,7 +123,7 @@ void SSD1306::MoveCursorByte(u8 row, u8 col)
 	if (col > 127) { col = 127; }
 	if (row > 7) { row = 7; }
 
-	if (type == 1106)
+	if (type == LCD_1106_128x64)
 		col += 2;	// sh1106 uses columns 2..129
 
 	SendCommand(SSD1306_CMD_SET_PAGE | row);		// 0xB0 page address
@@ -183,7 +186,7 @@ void SSD1306::SetContrast(u8 value)
 	contrast = value;
 	SendCommand(SSD1306_CMD_SET_CONTRAST_CONTROL);
 	SendCommand(value);
-	if (type == 1306)
+	if (type != LCD_1106_128x64)	// dont fiddle vcomdeselect on 1106 displays
 		SetVCOMDeselect( value >> 8);
 }
 
diff --git a/src/SSD1306.h b/src/SSD1306.h
index f1ea8d9..08314fa 100644
--- a/src/SSD1306.h
+++ b/src/SSD1306.h
@@ -76,7 +76,7 @@ class SSD1306
 public:
 	// 128x32 0x3C
 	// 128x64 0x3D or 0x3C (if SA0 is grounded)
-	SSD1306(int BSCMaster = 1, u8 address = 0x3C, int flip = 0, int type=1306);
+	SSD1306(int BSCMaster = 1, u8 address = 0x3C, int flip = 0, LCD_MODEL type=LCD_UNKNOWN);
 
 	void PlotCharacter(int x, int y, char ascii, bool inverse);
 	void PlotText(int x, int y, char* str, bool inverse);
diff --git a/src/options.h b/src/options.h
index f408b36..24dd1e9 100644
--- a/src/options.h
+++ b/src/options.h
@@ -19,12 +19,7 @@
 #ifndef OPTIONS_H
 #define OPTIONS_H
 
-typedef enum {
-        LCD_UNKNOWN,
-        LCD_1306_128x64,
-        LCD_1306_128x32,
-        LCD_1106_128x64,
-} LCD_MODEL;
+#include "types.h"
 
 class TextParser
 {
diff --git a/src/stb_image.h b/src/stb_image.h
index a056138..dc83749 100644
--- a/src/stb_image.h
+++ b/src/stb_image.h
@@ -892,12 +892,14 @@ static int stbi__mad3sizes_valid(int a, int b, int c, int add)
       stbi__addsizes_valid(a*b*c, add);
 }
 
+#ifndef STBI_NO_LINEAR
 // returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
 static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
 {
    return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
       stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
 }
+#endif
 
 // mallocs with size overflow checking
 static void *stbi__malloc_mad2(int a, int b, int add)
@@ -912,11 +914,13 @@ static void *stbi__malloc_mad3(int a, int b, int c, int add)
    return stbi__malloc(a*b*c + add);
 }
 
+#ifndef STBI_NO_LINEAR
 static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
 {
    if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
    return stbi__malloc(a*b*c*d + add);
 }
+#endif
 
 // stbi__err - error
 // stbi__errpf - error returning pointer to float
diff --git a/src/types.h b/src/types.h
index 253092b..22aa7dc 100644
--- a/src/types.h
+++ b/src/types.h
@@ -9,5 +9,11 @@ typedef unsigned long long	u64;
 
 typedef signed long long	s64;
 
+typedef enum {
+        LCD_UNKNOWN,
+        LCD_1306_128x64,
+        LCD_1306_128x32,
+        LCD_1106_128x64,
+} LCD_MODEL;
 
 #endif