diff --git a/src/LinearAlgebra.jl b/src/LinearAlgebra.jl
index d97c308b..1b0dbeaf 100644
--- a/src/LinearAlgebra.jl
+++ b/src/LinearAlgebra.jl
@@ -841,6 +841,8 @@ function lbt_openblas_onload_callback()
         end
         BLAS.lbt_set_num_threads(nthreads)
     end
+
+    return nothing
 end
 
 function __init__()
@@ -849,4 +851,7 @@ function __init__()
     libblastrampoline_jll.add_dependency!(OpenBLAS_jll, libopenblas, lbt_openblas_onload_callback)
 end
 
+# Register eagerly, so that LinearAlgebra is available for sysimage builds (incl. `--trim`)
+libblastrampoline_jll.add_dependency!(OpenBLAS_jll, libopenblas, lbt_openblas_onload_callback)
+
 end # module LinearAlgebra