diff --git a/devsupApp/src/dbdset.c b/devsupApp/src/dbdset.c
index 062a8aa..7b09902 100644
--- a/devsupApp/src/dbdset.c
+++ b/devsupApp/src/dbdset.c
@@ -16,6 +16,8 @@
 #include <alarm.h>
 #include <cantProceed.h>
 
+#include "pydevsup.h"
+
 typedef struct {
     dbCommon *precord;
 
@@ -235,6 +237,11 @@ typedef struct {
 static dset5 pydevsupCom = {{5, NULL, (DEVSUPFUN)&init, (DEVSUPFUN)&init_record, NULL}, (DEVSUPFUN)&process_record};
 static dset5 pydevsupCom2 = {{5, NULL, (DEVSUPFUN)&init, (DEVSUPFUN)&init_record2, NULL}, (DEVSUPFUN)&process_record};
 
+int isPyRecord(dbCommon *prec)
+{
+    return prec->dset==(dset*)&pydevsupCom || prec->dset==(dset*)&pydevsupCom2;
+}
+
 #include <epicsExport.h>
 
 epicsExportAddress(dset, pydevsupCom);
diff --git a/devsupApp/src/dbfield.c b/devsupApp/src/dbfield.c
index 6b0e372..eb293e8 100644
--- a/devsupApp/src/dbfield.c
+++ b/devsupApp/src/dbfield.c
@@ -13,6 +13,8 @@
 #include <dbAccess.h>
 #include <dbStaticLib.h>
 
+#include "pydevsup.h"
+
 #ifdef HAVE_NUMPY
 static int dbf2np_map[DBF_ENUM+1] = {
     NPY_BYTE,
diff --git a/devsupApp/src/dbrec.c b/devsupApp/src/dbrec.c
index 3fc6827..92c6556 100644
--- a/devsupApp/src/dbrec.c
+++ b/devsupApp/src/dbrec.c
@@ -11,6 +11,8 @@
 #include <dbStaticLib.h>
 #include <dbScan.h>
 
+#include "pydevsup.h"
+
 typedef struct {
     PyObject_HEAD
 
diff --git a/devsupApp/src/pydevsup.h b/devsupApp/src/pydevsup.h
new file mode 100644
index 0000000..b211985
--- /dev/null
+++ b/devsupApp/src/pydevsup.h
@@ -0,0 +1,13 @@
+#ifndef PYDEVSUP_H
+#define PYDEVSUP_H
+
+int pyField_prepare(void);
+void pyField_setup(PyObject *module);
+void PyField_cleanup(void);
+
+int pyRecord_prepare(void);
+void pyRecord_setup(PyObject *module);
+
+int isPyRecord(dbCommon *);
+
+#endif // PYDEVSUP_H
diff --git a/devsupApp/src/setup.c b/devsupApp/src/setup.c
index ea73647..6380f4f 100644
--- a/devsupApp/src/setup.c
+++ b/devsupApp/src/setup.c
@@ -21,12 +21,7 @@
 #include <epicsThread.h>
 #include <epicsExit.h>
 
-int pyField_prepare(void);
-void pyField_setup(PyObject *module);
-void PyField_cleanup(void);
-
-int pyRecord_prepare(void);
-void pyRecord_setup(PyObject *module);
+#include "pydevsup.h"
 
 /* dictionary of initHook names */
 static PyObject *hooktable;