diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42a2969..92f2216 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,8 @@ target_link_libraries(XISF PUBLIC Qt${QT_VERSION_MAJOR}::Core)
 
 if(BUILD_SHARED_LIBS)
     target_compile_definitions(XISF PRIVATE LIBXISF_LIBRARY)
-    target_compile_definitions(XISF LIBXISF_SHARED_LIB)
+else(BUILD_SHARED_LIBS)
+    target_compile_definitions(XISF PUBLIC LIBXISF_STATIC_LIB)
 endif(BUILD_SHARED_LIBS)
 
 set(XISF_PUBLIC_HEADERS libxisf.h libXISF_global.h)
diff --git a/libXISF_global.h b/libXISF_global.h
index 3b211b5..fd298de 100644
--- a/libXISF_global.h
+++ b/libXISF_global.h
@@ -21,14 +21,14 @@
 
 #include <QtCore/qglobal.h>
 
-#ifdef LIBXISF_SHARED_LIB
+#ifdef LIBXISF_STATIC_LIB
+#  define LIBXISF_EXPORT
+#else
 #  if defined(LIBXISF_LIBRARY)
 #    define LIBXISF_EXPORT Q_DECL_EXPORT
 #  else
 #    define LIBXISF_EXPORT Q_DECL_IMPORT
 #  endif
-#else
-#  define LIBXISF_EXPORT
 #endif
 
 #endif // LIBXISF_GLOBAL_H