diff --git a/x11-drivers/xf86-video-openchrome/files/patch-edb4657.c b/x11-drivers/xf86-video-openchrome/files/patch-edb4657.c
new file mode 100644
index 000000000000..4e3f83ef7dad
--- /dev/null
+++ b/x11-drivers/xf86-video-openchrome/files/patch-edb4657.c
@@ -0,0 +1,41 @@
+diff --git a/src/via_driver.h b/src/via_driver.h
+index b01229d..bfad2ee 100644
+--- src/via_driver.h
++++ src/via_driver.h
+@@ -361,8 +361,8 @@ void viaSetupDefaultOptions(ScrnInfoPtr pScrn);
+ void viaProcessOptions(ScrnInfoPtr pScrn);
+ 
+ /* In via_display.c. */
+-const xf86CrtcFuncsRec iga1_crtc_funcs;
+-const xf86CrtcFuncsRec iga2_crtc_funcs;
++extern const xf86CrtcFuncsRec iga1_crtc_funcs;
++extern const xf86CrtcFuncsRec iga2_crtc_funcs;
+ 
+ /* In via_exa.c. */
+ Bool viaInitExa(ScreenPtr pScreen);
+diff --git a/src/via_sii164.h b/src/via_sii164.h
+index 1a402aa..250ac75 100644
+--- src/via_sii164.h
++++ src/via_sii164.h
+@@ -51,7 +51,7 @@ typedef struct _viaSiI164 {
+ } viaSiI164Rec, *viaSiI164RecPtr;
+ 
+ 
+-const xf86OutputFuncsRec via_sii164_funcs;
++extern const xf86OutputFuncsRec via_sii164_funcs;
+ 
+ Bool viaSiI164Probe(ScrnInfoPtr pScrn, I2CBusPtr pI2CBus);
+ void viaSiI164Init(ScrnInfoPtr pScrn);
+diff --git a/src/via_vt1632.h b/src/via_vt1632.h
+index 4f93f6c..61dada1 100644
+--- src/via_vt1632.h
++++ src/via_vt1632.h
+@@ -51,7 +51,7 @@ typedef struct _VIAVT1632 {
+ } viaVT1632Rec, *viaVT1632RecPtr;
+ 
+ 
+-const xf86OutputFuncsRec via_vt1632_funcs;
++extern const xf86OutputFuncsRec via_vt1632_funcs;
+ 
+ Bool viaVT1632Probe(ScrnInfoPtr pScrn, I2CBusPtr pI2CBus);
+ void viaVT1632Init(ScrnInfoPtr pScrn);