diff --git a/include/corrupter.h b/include/corrupter.h
index 3a63667..87bbfbd 100644
--- a/include/corrupter.h
+++ b/include/corrupter.h
@@ -17,6 +17,9 @@
 #include "file_boundaries.h"
 #include "file_type.h"
 
+/* typedefs */
+typedef unsigned char byte;
+
 /* structures */
 struct _corrupter_result {
 	bool error;
@@ -28,7 +31,7 @@ struct _corrupter_result {
 struct _corrupter_param {
 	FILE* file;
 	uint16_t probability;
-	uint8_t threshold;
+	byte threshold;
 	size_t passes;
 	uint8_t config;
 	uint32_t* seed;
@@ -38,7 +41,6 @@ struct _corrupter_param {
 /* typedefs */
 typedef struct _corrupter_param Corrupter_Param;
 typedef struct _corrupter_result Corrupter_Result;
-typedef unsigned char byte;
 
 /* macros: procedures */
 #ifdef DEBUG
diff --git a/src/corrupter.c b/src/corrupter.c
index 25e4a74..d5d11ad 100644
--- a/src/corrupter.c
+++ b/src/corrupter.c
@@ -118,7 +118,7 @@ Corrupter_Result* corrupt_file(Corrupter_Param* param) {
 				continue;
 
 			// generate bit mask
-			unsigned char damage_left = (unsigned char) param->threshold;
+			byte damage_left = param->threshold;
 			static bool bit_mask[CHAR_BIT];
 
 			for (unsigned char bit = 0; bit < CHAR_BIT; bit++) {
@@ -132,7 +132,7 @@ Corrupter_Result* corrupt_file(Corrupter_Param* param) {
 
 			bool damaged_byte = false;
 
-			for (unsigned char bit = 0; bit < threshold; bit++) {
+			for (byte bit = 0; bit < threshold; bit++) {
 				if (bit_mask[bit] == false)
 					continue;