diff --git a/libs/esl/Makefile b/libs/esl/Makefile
index 6364c7a016..b9d9c2e07a 100644
--- a/libs/esl/Makefile
+++ b/libs/esl/Makefile
@@ -5,7 +5,7 @@ DEBUG=-g -ggdb
 BASE_FLAGS=$(INCS) -DHAVE_EDITLINE $(DEBUG) -I$(LIBEDIT_DIR)/src/ -fPIC
 PICKY=-O2 -ffast-math -Wall -Werror -Wunused-variable -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
 CFLAGS=$(BASE_FLAGS) $(PICKY)
-CXXFLAGS=$(BASE_FLAGS)
+CXXFLAGS=$(BASE_FLAGS) -Wall -Werror
 MYLIB=libesl.a
 LIBS=-lncurses -lpthread -lesl
 LDFLAGS=-L.
diff --git a/libs/esl/src/esl_oop.cpp b/libs/esl/src/esl_oop.cpp
index cf7fae4fd6..cd6fb53afc 100644
--- a/libs/esl/src/esl_oop.cpp
+++ b/libs/esl/src/esl_oop.cpp
@@ -296,8 +296,6 @@ const char *ESLevent::firstHeader(void)
 
 const char *ESLevent::serialize(const char *format)
 {
-	int isxml = 0;
-
 	this_check("");
 
 	esl_safe_free(serialized_string);