diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e357230..9f01c7e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,7 +52,7 @@ if(PESIEVE_AS_DLL)
 		${hdrs}
 		include/pe_sieve_api.h
 	)
-	add_library ( ${PROJECT_NAME} SHARED ${dll_hdrs} ${srcs} dll_main.cpp )
+	add_library ( ${PROJECT_NAME} SHARED ${dll_hdrs} ${srcs} dll_main.cpp main.def)
 else()
 	add_executable ( ${PROJECT_NAME} ${hdrs} ${srcs} main.cpp )
 endif()
diff --git a/main.def b/main.def
new file mode 100644
index 00000000..7e57d3a2
--- /dev/null
+++ b/main.def
@@ -0,0 +1,3 @@
+LIBRARY pe-sieve
+EXPORTS PESieve_help
+EXPORTS PESieve_scan