diff --git a/ref_gl/gl_context.c b/ref_gl/gl_context.c
index 7581d648..19cec68e 100644
--- a/ref_gl/gl_context.c
+++ b/ref_gl/gl_context.c
@@ -13,6 +13,8 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
 
+// GL API function pointers, if any, reside in this translation unit
+#define APIENTRY_LINKAGE
 #include "gl_local.h"
 #include "gl_export.h"
 
diff --git a/ref_gl/gl_export.h b/ref_gl/gl_export.h
index 8aee249f..20817fa3 100644
--- a/ref_gl/gl_export.h
+++ b/ref_gl/gl_export.h
@@ -20,7 +20,7 @@ GNU General Public License for more details.
 #endif
 
 #ifndef APIENTRY_LINKAGE
-#define APIENTRY_LINKAGE
+#define APIENTRY_LINKAGE extern
 #endif
 
 #if defined XASH_NANOGL || defined XASH_WES || defined XASH_REGAL