diff --git a/kpack_c.c b/kpack_c.c
index ac6c977..6ec16bd 100644
--- a/kpack_c.c
+++ b/kpack_c.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <getopt.h>
 #include <sys/stat.h>
+#include "lzma_c/LZMAEncoderApi.h"
 
 static const char* str_usage = "Usage: %s [--nologo / -n] [--kernel / -k] [--unpack / -u] <infile> [<outfile>]\n";
 
@@ -112,15 +113,33 @@ int main(int argc, char *argv[])
     fclose(infile_handle);
 
     // calculate maximum size of the output:
-    unsigned bufsize = infile_size*9/8 + 0x400; // should be enough for header
-    printf("bufsize = 0x%x\n", bufsize);
-    unsigned char *buf = malloc(2*bufsize); // allocate memory for two copies of maximum output
+    unsigned max_output_size = infile_size*9/8 + 0x400; // should be enough for header
+    printf("max_output_size = 0x%x\n", max_output_size);
+    unsigned char *buf = malloc(2*max_output_size); // allocate memory for two copies of maximum output
     if (buf == NULL) {
         error_malloc_failed();
     }
 
+    unsigned char *outfile = buf, *outfile1 = buf, *outfilebest = buf, *outfile2 = buf + max_output_size;
+    memcpy(buf, "KPCK", 4);
+    memcpy(buf + 4, (void*)&infile_size, sizeof(infile_size));
+
+    unsigned log_dict_size = (31 - __builtin_clz(infile_size - 1)) + 1;
+    if (log_dict_size > 28) {
+        log_dict_size = 28;
+    }
+    lzma_set_dict_size(log_dict_size);
+    unsigned dict_size = (1 << log_dict_size);
+
+    unsigned workmem_size = dict_size*19/2 + 0x509000;
+    unsigned char *workmem = malloc(workmem_size);
+    if (workmem == NULL) {
+        error_malloc_failed();
+    }
+    
+    printf("Compressing ... ");
+
     // TODO ...
-    // https://git.kolibrios.org/KolibriOS/kolibrios/src/commit/293e1d195a14d01a0f8812a954ff1449048f6209/programs/other/kpack/kerpack_linux/kpack64.asm#L236
 
     return 0;
 }
\ No newline at end of file