diff --git a/interfaces/cython/cantera/ck2cti.py b/interfaces/cython/cantera/ck2cti.py
index 4394c6f78..849cd7ce8 100644
--- a/interfaces/cython/cantera/ck2cti.py
+++ b/interfaces/cython/cantera/ck2cti.py
@@ -1385,6 +1385,11 @@ class Parser(object):
                                       'next section on line {0}.'.format(self.line_number))
                             advance = False
                             tokens.pop()
+                            # Fix the case where there THERMO ALL or REAC UNITS
+                            # ends the species section
+                            if (tokens[-1].upper().startswith('THER') or
+                                tokens[-1].upper().startswith('REAC')):
+                                tokens.pop()
                             break
 
                         line, comment = readline()
diff --git a/interfaces/cython/cantera/test/test_convert.py b/interfaces/cython/cantera/test/test_convert.py
index 494742233..a62a5f3a7 100644
--- a/interfaces/cython/cantera/test/test_convert.py
+++ b/interfaces/cython/cantera/test/test_convert.py
@@ -159,6 +159,20 @@ class chemkinConverterTest(utilities.CanteraTest):
         self.assertEqual(gas.n_species, 3)
         self.assertEqual(gas.n_reactions, 2)
 
+    def test_unterminatedSections2(self):
+        self.assertRaises(ck2cti.InputParseError,
+                          lambda: convertMech('../data/unterminated-sections2.inp',
+                                              outName='unterminated-sections2.cti',
+                                              quiet=True))
+
+        convertMech('../data/unterminated-sections2.inp',
+                    outName='unterminated-sections2.cti',
+                    quiet=True, permissive=True)
+
+        gas = ct.Solution('unterminated-sections2.cti')
+        self.assertEqual(gas.n_species, 3)
+        self.assertEqual(gas.n_reactions, 2)
+
     def test_nasa9(self):
         convertMech('../data/nasa9-test.inp',
                     thermoFile='../data/nasa9-test-therm.dat',
diff --git a/test/data/unterminated-sections2.inp b/test/data/unterminated-sections2.inp
new file mode 100644
index 000000000..d952e7181
--- /dev/null
+++ b/test/data/unterminated-sections2.inp
@@ -0,0 +1,31 @@
+Elements
+H  C
+
+SPECIES
+foo bar baz
+
+
+thermo All
+    300.000  1000.000  5000.000
+foo                     C   1H   4          G   200.000  3500.000  1000.000    1
+ 7.48514950E-02 1.33909467E-02-5.73285809E-06 1.22292535E-09-1.01815230E-13    2
+-9.46834459E+03 1.84373180E+01 5.14987613E+00-1.36709788E-02 4.91800599E-05    3
+-4.84743026E-08 1.66693956E-11-1.02466476E+04-4.64130376E+00                   4
+bar                     C   1H   4          G   200.000  3500.000  1000.000    1
+ 7.48514950E-02 1.33909467E-02-5.73285809E-06 1.22292535E-09-1.01815230E-13    2
+-9.46834459E+03 1.84373180E+01 5.14987613E+00-1.36709788E-02 4.91800599E-05    3
+-4.84743026E-08 1.66693956E-11-1.02466476E+04-4.64130376E+00                   4
+baz                     C   1H   4          G   200.000  3500.000  1000.000    1
+ 7.48514950E-02 1.33909467E-02-5.73285809E-06 1.22292535E-09-1.01815230E-13    2
+-9.46834459E+03 1.84373180E+01 5.14987613E+00-1.36709788E-02 4.91800599E-05    3
+-4.84743026E-08 1.66693956E-11-1.02466476E+04-4.64130376E+00                   4
+
+reactions cal/mol
+foo + bar = 2 baz      1.2345e12  1.0  200.0
+2foo + baz = 3bar      5.4321e10  1.0  500.0
+
+transport
+foo               2   357.000     5.180     0.000     0.000     1.000
+bar               2   266.800     4.982     0.000     0.000     1.000
+baz               2   266.800     4.982     0.000     0.000     1.000
+! some comment