diff --git a/src/str.cpp b/src/str.cpp
index 5889d92d..7050f79b 100644
--- a/src/str.cpp
+++ b/src/str.cpp
@@ -300,6 +300,9 @@ bool
 str::eq(const char *s0_,
         const char *s1_) noexcept
 {
+  if((s0_ == nullptr) || (s1_ == nullptr))
+    return (s0_ == s1_);
+
   return (std::strcmp(s0_, s1_) == 0);
 }