diff --git a/src/gallium/frontends/dri/dri_util.c b/src/gallium/frontends/dri/dri_util.c
index 55301b2e2c7..508c5b87a71 100644
--- a/src/gallium/frontends/dri/dri_util.c
+++ b/src/gallium/frontends/dri/dri_util.c
@@ -1129,16 +1129,6 @@ static const struct {
    },
 };
 
-uint32_t
-driGLFormatToImageFormat(mesa_format format)
-{
-   for (size_t i = 0; i < ARRAY_SIZE(format_mapping); i++)
-      if (format_mapping[i].mesa_format == format)
-         return format_mapping[i].image_format;
-
-   return __DRI_IMAGE_FORMAT_NONE;
-}
-
 uint32_t
 driGLFormatToSizedInternalGLFormat(mesa_format format)
 {
diff --git a/src/gallium/frontends/dri/dri_util.h b/src/gallium/frontends/dri/dri_util.h
index 648df773c27..1a31597c719 100644
--- a/src/gallium/frontends/dri/dri_util.h
+++ b/src/gallium/frontends/dri/dri_util.h
@@ -122,9 +122,6 @@ driCreateContextAttribs(__DRIscreen *psp, int api,
                         unsigned *error,
                         void *data);
 
-extern uint32_t
-driGLFormatToImageFormat(mesa_format format);
-
 extern uint32_t
 driGLFormatToSizedInternalGLFormat(mesa_format format);