diff --git a/src/mesa/main/pack.c b/src/mesa/main/pack.c
index 092e541c5db..ecdeaf5dccf 100644
--- a/src/mesa/main/pack.c
+++ b/src/mesa/main/pack.c
@@ -3717,6 +3717,7 @@ _mesa_unpack_color_span_ubyte(struct gl_context *ctx,
 
          if (!indexes) {
             _mesa_error(ctx, GL_OUT_OF_MEMORY, "pixel unpacking");
+            free(rgba);
             return;
          }