diff --git a/interfaces/cython/SConscript b/interfaces/cython/SConscript
index c55debb2fb..423eb725e9 100644
--- a/interfaces/cython/SConscript
+++ b/interfaces/cython/SConscript
@@ -52,6 +52,9 @@ localenv.Prepend(LIBS=localenv['cantera_libs'])
 if localenv['HAS_CLANG'] and parse_version(py_version) == parse_version('3.8'):
     localenv.Append(CXXFLAGS='-Wno-deprecated-declarations')
 
+if localenv["CC"] == "icc":
+    localenv.Append(CPPDEFINES={"CYTHON_FALLTHROUGH":" __attribute__((fallthrough))"})
+
 if localenv['OS'] == 'Darwin':
     localenv.Append(LINKFLAGS='-undefined dynamic_lookup')
 elif localenv['OS'] == 'Windows':