diff --git a/distance.c b/distance.c
index 731999f..e47560a 100644
--- a/distance.c
+++ b/distance.c
@@ -58,7 +58,7 @@ int main(int argc, char **argv) {
       if ((a < max_w) && (vocab[b * max_w + a] != '\n')) a++;
     }
     vocab[b * max_w + a] = 0;
-    for (a = 0; a < size; a++) fread(&M[a + b * size], sizeof(float), 1, f);
+    fread(&M[b * size], sizeof(float), size, f);
     len = 0;
     for (a = 0; a < size; a++) len += M[a + b * size] * M[a + b * size];
     len = sqrt(len);