diff --git a/sci-libs/ceres_solver/ceres_solver-2.0.1~git.recipe b/sci-libs/ceres_solver/ceres_solver-2.0.1~git.recipe
index ba038c205..2788925f0 100644
--- a/sci-libs/ceres_solver/ceres_solver-2.0.1~git.recipe
+++ b/sci-libs/ceres_solver/ceres_solver-2.0.1~git.recipe
@@ -16,7 +16,7 @@ SOURCE_FILENAME="ceres-solver-$portVersion-tar.gz"
 SOURCE_DIR="ceres-solver-$srcGitRev"
 
 ARCHITECTURES="!x86_gcc2 all"
-SECONDARY_ARCHITECTURES="?x86"
+SECONDARY_ARCHITECTURES="x86"
 
 libVersion="2.1.0"
 libVersionCompat="$libVersion compat >= ${libVersion%%.*}"