diff --git a/tools/auto-tester/CMakeLists.txt b/tools/auto-tester/CMakeLists.txt
index 0c85ff597c..8c0294adf1 100644
--- a/tools/auto-tester/CMakeLists.txt
+++ b/tools/auto-tester/CMakeLists.txt
@@ -8,7 +8,7 @@ SET(CMAKE_AUTOMOC ON)
 setup_hifi_project(Core Widgets)
 
 # Add compiler flags for building executables (-fPIE)
-set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
 # Qt includes
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
diff --git a/tools/auto-tester/src/ImageComparer.cpp b/tools/auto-tester/src/ImageComparer.cpp
index 7a67750df1..2616f7f1ea 100644
--- a/tools/auto-tester/src/ImageComparer.cpp
+++ b/tools/auto-tester/src/ImageComparer.cpp
@@ -22,8 +22,8 @@ double ImageComparer::compareImages(QImage resultImage, QImage expectedImage) co
     }
 
     const int L = 255; // (2^number of bits per pixel) - 1
-    const double c1 = pow((K1 * L), 2);
-    const double c2 = pow((K2 * L), 2);
+    const double c1 = (K1 * L) * (K1 * L);
+    const double c2 = (K2 * L) * (K2 * L);
 
     // Coefficients for luminosity calculation
     const double RED_COEFFICIENT = 0.212655f;