diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..641002a
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/bash
+
+set -xe
+mkdir -p modules
+
+CCARGS="-Isrc/include -Wall -pedantic"
+
+cc -o dim src/main.c src/plug.c $CCARGS -lX11 -ldl
+cc -o modules/clocky.dim src/modules/clock.c -rdynamic -shared -fPIC $CCARGS
+cc -o modules/battery.dim src/modules/battery.c -rdynamic -shared -fPIC $CCARGS
+
+
diff --git a/src/modules/battery.c b/src/modules/battery.c
index 4ba38d3..fff6651 100644
--- a/src/modules/battery.c
+++ b/src/modules/battery.c
@@ -33,6 +33,7 @@ void plug_init(void) {
 void plug_reload(void) { /* Unused */ }
 
 void plug_poll(char* buf, size_t len) {
+    if (!fp) return;
     int perc = 0;
     fseek(fp, 0, SEEK_SET);
     fscanf(fp, "%d", &perc);