diff --git a/sessions.h b/sessions.h
index 357ae4f..28108f1 100644
--- a/sessions.h
+++ b/sessions.h
@@ -18,6 +18,10 @@ int getpstartts(int pid, unsigned long long* startts) {
 		err(1, "Could not open %s", path);
 
 	int bytes_read = read(fd, fc, sizeof(fc));
+    if (bytes_read < 0)
+        err(1, "Could not read %s", path);
+    fc[bytes_read] = '\0';
+
 	close(fd);
 
 	if (memchr(ptr, '\0', bytes_read) != NULL)
@@ -123,8 +127,10 @@ int getsession(int pid, unsigned int ts_ttl) {
         err(1, "Could not open %s", path);
     }
 
-    if (read(fd, ts_str, sizeof(ts_str)) < 0)
+    int bytes_read = read(fd, ts_str, sizeof(ts_str));
+    if (bytes_read < 0)
         err(1, "Could not read %s", path);
+    ts_str[bytes_read] = '\0';
 
     startts = strtoull(ts_str, NULL, 10);
     current = time(NULL);