diff --git a/src/gl/textures/gl_material.h b/src/gl/textures/gl_material.h
index f93e784f4..fc10f3a49 100644
--- a/src/gl/textures/gl_material.h
+++ b/src/gl/textures/gl_material.h
@@ -57,7 +57,7 @@ class FGLTexture
 public:
 	FTexture * tex;
 	FTexture * hirestexture;
-	char bIsTransparent;
+	int8_t bIsTransparent;
 	int HiresLump;
 
 private:
diff --git a/src/m_misc.cpp b/src/m_misc.cpp
index 8673102a2..bda8dcb80 100644
--- a/src/m_misc.cpp
+++ b/src/m_misc.cpp
@@ -432,27 +432,27 @@ void M_LoadDefaults ()
 
 struct pcx_t
 {
-	char				manufacturer;
-	char				version;
-	char				encoding;
-	char				bits_per_pixel;
+	int8_t				manufacturer;
+	int8_t				version;
+	int8_t				encoding;
+	int8_t				bits_per_pixel;
 
-	unsigned short		xmin;
-	unsigned short		ymin;
-	unsigned short		xmax;
-	unsigned short		ymax;
+	uint16_t			xmin;
+	uint16_t			ymin;
+	uint16_t			xmax;
+	uint16_t			ymax;
 	
-	unsigned short		hdpi;
-	unsigned short		vdpi;
+	uint16_t			hdpi;
+	uint16_t			vdpi;
 
-	unsigned char		palette[48];
+	uint8_t				palette[48];
 	
-	char				reserved;
-	char				color_planes;
-	unsigned short		bytes_per_line;
-	unsigned short		palette_type;
+	int8_t				reserved;
+	int8_t				color_planes;
+	uint16_t			bytes_per_line;
+	uint16_t			palette_type;
 	
-	char				filler[58];
+	int8_t				filler[58];
 };