diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b3451987..8e61e6953 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -785,6 +785,10 @@ elseif(BUILD_GLES2)
 	set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS},libgles2")
 endif()
 
+if (WIN32 AND NOT USE_EPOXY)
+    message(FATAL_ERROR "Windows requires epoxy module!")
+endif()
+
 if(USE_SQLITE3)
 	list(APPEND FEATURES SQLITE3)
 	include_directories(AFTER ${SQLITE3_INCLUDE_DIRS})
diff --git a/src/platform/cmake/Findepoxy.cmake b/src/platform/cmake/Findepoxy.cmake
index 1f56add79..0a5ce4091 100644
--- a/src/platform/cmake/Findepoxy.cmake
+++ b/src/platform/cmake/Findepoxy.cmake
@@ -8,7 +8,3 @@ endif()
 if(EPOXY_LIBRARIES AND EPOXY_INCLUDE_DIRS)
     set(epoxy_FOUND TRUE)
 endif()
-
-if (WIN32 AND NOT epoxy_FOUND)
-    message(FATAL_ERROR "Windows requires epoxy module!")
-endif()
diff --git a/src/platform/python/_builder.h b/src/platform/python/_builder.h
index 7c37e4a18..a0a27d5a7 100644
--- a/src/platform/python/_builder.h
+++ b/src/platform/python/_builder.h
@@ -5,6 +5,7 @@
 #define _SYS_TIME_H_
 #define _TIME_H
 #define _TIME_H_
+#define MGBA_EXPORT
 
 #define ATTRIBUTE_FORMAT(X, Y, Z)
 #define DECL_BITFIELD(newtype, oldtype) typedef oldtype newtype
diff --git a/src/platform/python/_builder.py b/src/platform/python/_builder.py
index 6b76ee698..82c484e64 100644
--- a/src/platform/python/_builder.py
+++ b/src/platform/python/_builder.py
@@ -18,6 +18,7 @@ cppflags.extend(["-I" + incdir, "-I" + srcdir, "-I" + bindir])
 ffi.set_source("mgba._pylib", """
 #define static
 #define inline
+#define MGBA_EXPORT
 #include <mgba/flags.h>
 #define OPAQUE_THREADING
 #include <mgba/core/blip_buf.h>