diff --git a/src/gas/gas.cxx b/src/gas/gas.cxx
index 06855aeb..ac261102 100644
--- a/src/gas/gas.cxx
+++ b/src/gas/gas.cxx
@@ -92,7 +92,7 @@ Gas::getSample () {
 void
 Gas::printGraph (thresholdContext* ctx, uint8_t resolution) {
     std::cout << "(" << ctx->runningAverage << ") | ";
-    for (int i = 0; i < ctx->runningAverage / resolution; i++)
+    for (unsigned int i = 0; i < ctx->runningAverage / resolution; i++)
         std::cout << "*";
     std::cout << std::endl;
 }
diff --git a/src/gas/gas.hpp b/src/gas/gas.hpp
index 60b7a8f2..00f59b7a 100644
--- a/src/gas/gas.hpp
+++ b/src/gas/gas.hpp
@@ -28,7 +28,7 @@
 
 struct thresholdContext {
     long averageReading;
-    long runningAverage;
+    unsigned long runningAverage;
     int averagedOver;
 };