diff --git a/_info-bin.sh b/_info-bin.sh
index 1d9bdd4dc..12c4c49e5 100755
--- a/_info-bin.sh
+++ b/_info-bin.sh
@@ -74,7 +74,7 @@ while [ -n "${1:-}" ]; do
       "${NM}" --extern-only --defined-only "${f}"  # -g -U
       "${NM}" --extern-only --defined-only "${f}" | grep -a -F ' _curl_' | sort || false  # -g -U
       # should not export anything else except the libcurl API
-      if ! "${NM}" --extern-only --defined-only "${f}" | grep -a -F -v ' T _curl_'; then
+      if "${NM}" --extern-only --defined-only "${f}" | grep -a -F -v ' T _curl_'; then
         echo "! '${f}' exports non-curl symbols."
         exit 1
       fi