diff --git a/Makefile b/Makefile
index d67ab17c614..991bed3b428 100644
--- a/Makefile
+++ b/Makefile
@@ -174,7 +174,7 @@ LD_gcov = gcc
 LDXX_gcov = g++
 CPPFLAGS_gcov = -O0 -fprofile-arcs -ftest-coverage
 LDFLAGS_gcov = -fprofile-arcs -ftest-coverage
-DEFINES_gcov = NDEBUG
+DEFINES_gcov = _DEBUG DEBUG
 
 
 # General settings.
diff --git a/templates/Makefile.template b/templates/Makefile.template
index fe455d1c208..9a12cf99226 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -188,7 +188,7 @@ LD_gcov = gcc
 LDXX_gcov = g++
 CPPFLAGS_gcov = -O0 -fprofile-arcs -ftest-coverage
 LDFLAGS_gcov = -fprofile-arcs -ftest-coverage
-DEFINES_gcov = NDEBUG
+DEFINES_gcov = _DEBUG DEBUG
 
 
 # General settings.