diff --git a/.github/workflows/TestingCI.yml b/.github/workflows/TestingCI.yml
new file mode 100644
index 0000000..6b7996d
--- /dev/null
+++ b/.github/workflows/TestingCI.yml
@@ -0,0 +1,21 @@
+name: CI
+
+on: [push]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  linux-ubuntu:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install deps
+      run: sudo apt-get -y install flex bison autopoint gettext
+    - name: Prepare
+      run: ./autogen.sh && ./configure
+    - name: Build
+      run: make -s
+
diff --git a/expr/expr.cc b/expr/expr.cc
index 9459620..3412c8f 100644
--- a/expr/expr.cc
+++ b/expr/expr.cc
@@ -55,7 +55,9 @@ enum token_type {
 };
 
 extern "C" {
+#if 0
 long long yylval = 0;
+#endif
 #define YYSTYPE long long
 #include "expr-parse.h"