diff --git a/IPhreeqc_interface_F.h b/IPhreeqc_interface_F.h
index d1c3e2a3..d3fe29ec 100644
--- a/IPhreeqc_interface_F.h
+++ b/IPhreeqc_interface_F.h
@@ -1,11 +1,7 @@
 #ifndef __IPHREEQC_INTERFACE__H
 #define __IPHREEQC_INTERFACE__H
 
-#if defined(_WINDLL)
-#define IPQ_DLL_EXPORT __declspec(dllexport)
-#else
-#define IPQ_DLL_EXPORT
-#endif
+#include "PHRQ_exports.h"
 
 #ifdef SKIP
 #if defined(FC_FUNC)
diff --git a/phreeqcpp/common/PHRQ_exports.h b/phreeqcpp/common/PHRQ_exports.h
index d936a60c..8f50a7cc 100644
--- a/phreeqcpp/common/PHRQ_exports.h
+++ b/phreeqcpp/common/PHRQ_exports.h
@@ -1,12 +1,9 @@
 #ifndef INC_PHRQ_EXPORTS_H
 #define INC_PHRQ_EXPORTS_H
 
-#if defined(_WINDLL)
-#  ifdef IPhreeqc_EXPORTS
-#    define IPQ_DLL_EXPORT __declspec(dllexport)
-#  else
-#    define IPQ_DLL_EXPORT __declspec(dllimport)
-#  endif
+
+#if defined(_WINDLL) && defined(IPhreeqc_EXPORTS)
+#  define IPQ_DLL_EXPORT __declspec(dllexport)
 #else
 #  define IPQ_DLL_EXPORT
 #endif