diff --git a/.github/workflows/matrix_build.yml b/.github/workflows/matrix_build.yml
index a50eea6a..a2c4113c 100644
--- a/.github/workflows/matrix_build.yml
+++ b/.github/workflows/matrix_build.yml
@@ -366,7 +366,7 @@ jobs:
               PREFIX="${PREFIX}${LIBC}${ABI}"
             ;;
             glibc)
-              PREFIX="${PREFIX}gnu{ABI}"
+              PREFIX="${PREFIX}gnu${ABI}"
             ;;
           esac
           echo "BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX=\"${PREFIX}\"" >> $CONF_PATH