diff --git a/CHANGELOG.md b/CHANGELOG.md
index c66b1abe..f3050dd0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 1.26.7
 
 * Add an option to quiet the progress indicator but not warnings
+* Enable more compiler warnings and fix related problems
 
 ## 1.26.6
 
diff --git a/Makefile b/Makefile
index 195d37d8..009f84a7 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ CXX := $(CXX)
 CFLAGS := $(CFLAGS)
 CXXFLAGS := $(CXXFLAGS) -std=c++11
 LDFLAGS := $(LDFLAGS)
-WARNING_FLAGS := -Wall -Wshadow -Wsign-compare -Wextra -Wunreachable-code -Wuninitialized -Wshadow -Weffc++
+WARNING_FLAGS := -Wall -Wshadow -Wsign-compare -Wextra -Wunreachable-code -Wuninitialized -Wshadow
 RELEASE_FLAGS := -O3 -DNDEBUG
 DEBUG_FLAGS := -O0 -DDEBUG -fno-inline-functions -fno-omit-frame-pointer