diff --git a/sk1/compressor.c b/sk1/compressor.c
index d6598e6..ecf4379 100644
--- a/sk1/compressor.c
+++ b/sk1/compressor.c
@@ -85,7 +85,7 @@ unsigned char* decompress_1_buffer(const unsigned char* data, size_t size, size_
     return decompressed;
 }
 
-int decompress_1(const char* output_file_name, const char* input_file_name) {
+int decompress_1(const char* input_file_name, const char* output_file_name) {
     size_t size;
     unsigned char* data;
     if (read_file(input_file_name, &data, &size) != 0) return -1;
@@ -170,7 +170,7 @@ int compress_2(const char* input_file_name, const char* output_file_name) {
     return 0;
 }
 
-int decompress_2(const char* output_file_name, const char* input_file_name) {
+int decompress_2(const char* input_file_name, const char* output_file_name) {
     unsigned char* data;
     size_t size;
     if (read_file(input_file_name, &data, &size) != 0) {