diff --git a/Makefile b/Makefile
index 6ea7fca..3e0841d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CXX       = clang++
 CXXFLAGS  = -std=c++11 -W -Wall -O3 -ffast-math -g -Werror
 LFLAGS    = -flto
-DEFINES   = #-DSIMD
+DEFINES   = -DSIMD
 BUILD_DIR = /tmp
 SRC       = rotation.cpp \
 	    image.cpp \
@@ -33,3 +33,6 @@ debug: all
 
 cachegrind: all
 	valgrind --tool=cachegrind --dsymutil=yes $(BUILD_DIR)/rotation $(IMG)
+
+callgrind: all
+	valgrind --tool=callgrind --dsymutil=yes $(BUILD_DIR)/rotation $(IMG)