diff --git a/polymer/eduke32/build/include/sdlayer.h b/polymer/eduke32/build/include/sdlayer.h
index 85dca220c..6954dc8ae 100644
--- a/polymer/eduke32/build/include/sdlayer.h
+++ b/polymer/eduke32/build/include/sdlayer.h
@@ -9,6 +9,8 @@
 #include "compat.h"
 #include "baselayer.h"
 
+#define EDUKE32_SDL_LINKED_PREREQ(x, a, b, c) ((x).major > (a) || ((x).major == (a) && ((x).minor > (b) || ((x).minor == (b) && (x).patch >= (c)))))
+
 extern int32_t maxrefreshfreq;
 
 #ifdef _WIN32
diff --git a/polymer/eduke32/build/src/sdlayer.c b/polymer/eduke32/build/src/sdlayer.c
index a78942f9f..47f692444 100644
--- a/polymer/eduke32/build/src/sdlayer.c
+++ b/polymer/eduke32/build/src/sdlayer.c
@@ -49,6 +49,8 @@
 # define SDL_DISABLE_8BIT_BUFFER
 #endif
 
+static SDL_version linked;
+
 #if !defined STARTUP_SETUP_WINDOW
 int32_t startwin_open(void) { return 0; }
 int32_t startwin_close(void) { return 0; }
@@ -508,7 +510,6 @@ int32_t sdlayer_checkversion(void);
 int32_t sdlayer_checkversion(void)
 {
     SDL_version compiled;
-    SDL_version linked;
 
     SDL_GetVersion(&linked);
     SDL_VERSION(&compiled);