diff --git a/sk1/compressor.c b/sk1/compressor.c
index 3b1d122..8909a0d 100644
--- a/sk1/compressor.c
+++ b/sk1/compressor.c
@@ -11,7 +11,7 @@ typedef struct {
 
 int compress_1(const char* input_file, const char* output_file)
 {
-    size_t compr_size = 0, sz=0;
+    int  compr_size = 0, sz=0;
     FILE* input = fopen(input_file, "rb");
     FILE* output = fopen(output_file, "wb");
 
@@ -28,7 +28,7 @@ int compress_1(const char* input_file, const char* output_file)
 
     while (!feof(input))
     {
-        size_t blen = fread(buffer, 1, BSIZE, input);
+        int blen = fread(buffer, 1, BSIZE, input);
 
         for (int bpos = 0; bpos < blen; ++bpos)
         {
@@ -95,7 +95,7 @@ int compress_1(const char* input_file, const char* output_file)
 
 int decompress_1(const char* input_file, const char* output_file)
 {
-    size_t compr_size = 0, sz = 0;
+    int compr_size = 0, sz = 0;
     FILE* input = fopen(input_file, "rb");
     FILE* output = fopen(output_file, "wb");