diff --git a/motorApp/NewportSrc/hxp_drivers.h b/motorApp/NewportSrc/hxp_drivers.h
index 8c21de28..45c6bc22 100644
--- a/motorApp/NewportSrc/hxp_drivers.h
+++ b/motorApp/NewportSrc/hxp_drivers.h
@@ -6,12 +6,16 @@
  *************************************************/
 
 #ifdef _WIN32
-	#ifndef DLL
-		#define DLL _declspec(dllimport)
-	#endif
+    #ifndef DLL
+        #ifdef _DLL  /* _DLL is defined by EPICS if we are being compiled to call DLLs */
+            #define DLL _declspec(dllimport)
+        #else
+            #define DLL
+        #endif
+    #endif
 #else
-	#define DLL 
-	#define __stdcall
+    #define DLL 
+    #define __stdcall
 #endif
 #ifdef __cplusplus
 extern "C"