diff --git a/src/msh.c b/src/msh.c
index 062da60..3e62a3c 100644
--- a/src/msh.c
+++ b/src/msh.c
@@ -469,6 +469,12 @@ int main(int argc, char** argv) {
 
         line[linelen] = 0;
 
+        if (linelen == 0) {
+            free(line);
+            line = NULL;
+            continue;
+        }
+
         fprintf(historyfile, "%s\n", line);
         fflush(historyfile);