diff --git a/src/logarithmus.c b/src/logarithmus.c
index f212821..a7abbbb 100644
--- a/src/logarithmus.c
+++ b/src/logarithmus.c
@@ -15,6 +15,10 @@ double logDec(double a){
     return logX(10.0, a);
 }
 
+double logBin(double a){
+    return logX(2.0, a);
+}
+
 double logN(double x, double eps){
     if(x <= 0){
         return -1.0;