diff --git a/src/shell/smtlib_frontend.cpp b/src/shell/smtlib_frontend.cpp
index 31c964ae0..c9fa69221 100644
--- a/src/shell/smtlib_frontend.cpp
+++ b/src/shell/smtlib_frontend.cpp
@@ -29,6 +29,7 @@ Revision History:
 #include"opt_cmds.h"
 #include"polynomial_cmds.h"
 #include"subpaving_cmds.h"
+#include"smt2_extra_cmds.h"
 #include"smt_strategic_solver.h"
 #include"smt_solver.h"
 
@@ -113,6 +114,7 @@ unsigned read_smtlib2_commands(char const * file_name) {
     install_polynomial_cmds(ctx);
     install_subpaving_cmds(ctx);
     install_opt_cmds(ctx);
+    install_smt2_extra_cmds(ctx);
 
     g_cmd_context = &ctx;
     signal(SIGINT, on_ctrl_c);
diff --git a/src/smt/smt2_extra_cmds.cpp b/src/smt/smt2_extra_cmds.cpp
new file mode 100644
index 000000000..866a1178e
--- /dev/null
+++ b/src/smt/smt2_extra_cmds.cpp
@@ -0,0 +1,47 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    smt2_extra_cmds.cpp
+
+Abstract:
+
+    Additional SMT-specific commands.
+
+Author:
+
+    Christoph (cwinter) 2017-01-16
+
+Notes:
+
+--*/
+#include"cmd_context.h"
+#include"smt2parser.h"
+#include"smt2_extra_cmds.h"
+
+class include_cmd : public cmd {
+    char const * m_filename;
+public:
+    include_cmd() : cmd("include"), m_filename(0) {}
+    virtual char const * get_usage() const { return "<string>"; }
+    virtual char const * get_descr(cmd_context & ctx) const { return "include a file"; }
+    virtual unsigned get_arity() const { return 1; }
+    virtual cmd_arg_kind next_arg_kind(cmd_context & ctx) const { return CPK_STRING; }
+    virtual void set_next_arg(cmd_context & ctx, char const * val) { m_filename = val; }
+    virtual void failure_cleanup(cmd_context & ctx) {}
+    virtual void execute(cmd_context & ctx) {
+        std::ifstream is(m_filename);
+        if (is.bad() || is.fail())
+            throw cmd_exception(std::string("failed to open file '") + m_filename + "'");
+        parse_smt2_commands(ctx, is, false);
+        is.close();
+    }
+    virtual void prepare(cmd_context & ctx) { reset(ctx); }
+    virtual void reset(cmd_context & ctx) { m_filename = 0; }
+    virtual void finalize(cmd_context & ctx) { reset(ctx); }
+};
+
+void install_smt2_extra_cmds(cmd_context & ctx) {
+    ctx.insert(alloc(include_cmd));
+}
\ No newline at end of file
diff --git a/src/smt/smt2_extra_cmds.h b/src/smt/smt2_extra_cmds.h
new file mode 100644
index 000000000..947f5ed7a
--- /dev/null
+++ b/src/smt/smt2_extra_cmds.h
@@ -0,0 +1,26 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    smt2_extra_cmds.h
+
+Abstract:
+
+    Additional SMT-specific commands.
+
+Author:
+
+    Christoph (cwinter) 2017-01-16
+
+Notes:
+
+--*/
+#ifndef SMT2_EXTRA_CMDS_H_
+#define SMT2_EXTRA_CMDS_H_
+
+class cmd_context;
+
+void install_smt2_extra_cmds(cmd_context & ctx);
+
+#endif /* SMT2_EXTRA_CMDS_H_ */