diff --git a/src/parsers/util/scanner.h b/src/parsers/util/scanner.h
index 2a59451b9..d44c8c82f 100644
--- a/src/parsers/util/scanner.h
+++ b/src/parsers/util/scanner.h
@@ -71,7 +71,7 @@ private:
     buffer<char>       m_buffer;
     unsigned           m_bpos;
     unsigned           m_bend;
-    char        m_last_char;
+    char               m_last_char;
     bool               m_is_interactive;
     bool               m_smt2;
     bool               m_bv_token;
diff --git a/src/smt/mam.cpp b/src/smt/mam.cpp
index 20e2de2a8..de4473c5b 100644
--- a/src/smt/mam.cpp
+++ b/src/smt/mam.cpp
@@ -2106,6 +2106,7 @@ namespace smt {
             enode * p = *it1;
             if (p->get_decl() == j2->m_decl &&
                 m_context.is_relevant(p) &&
+                p->get_num_args() > j2->m_arg_pos && 
                 p->is_cgr() &&
                 p->get_arg(j2->m_arg_pos)->get_root() == n) {
                 // p is in joint2