diff --git a/Makefile.am b/Makefile.am
index ddae12f..2631db9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,7 +3,7 @@ ACLOCAL_AMFLAGS = -I m4
 bin_PROGRAMS = create_token
 create_token_SOURCES = base64.c createToken.c
 create_token_LDADD   = src/libtoken.la $(LIBOBJS)
-create_token_CFLAGS  = -I include
+create_token_CFLAGS  = -Wall -I include
 
 EXTRA_DIST = base64.h
 
diff --git a/Makefile.in b/Makefile.in
index 647759d..6cee95e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -242,7 +242,7 @@ top_srcdir = @top_srcdir@
 ACLOCAL_AMFLAGS = -I m4
 create_token_SOURCES = base64.c createToken.c
 create_token_LDADD = src/libtoken.la $(LIBOBJS)
-create_token_CFLAGS = -I include
+create_token_CFLAGS = -Wall -I include
 EXTRA_DIST = base64.h
 SUBDIRS = src include tests
 all: config.h
diff --git a/include/token/cclass.h b/include/token/cclass.h
index d93981f..f5ea742 100644
--- a/include/token/cclass.h
+++ b/include/token/cclass.h
@@ -41,7 +41,7 @@
         (jCtor)jsonConst, \
         (dtor)__destruct, \
         (jTo)toJson \
-    }; const _CCLASS const __##class = &_class
+    }; const _CCLASS const __##class = (const _CCLASS const)&_class
 
 
 
@@ -62,12 +62,12 @@ typedef struct CCLASS {
 #define CCLASS_PTR_SIZE     sizeof(struct CCLASS *)
 #define CCLASS_SIZE         sizeof(struct CCLASS)
 
-void *               _new(const void * _class, ...);
-void *               _newFromJson(const void * _class, struct json_object * json);
+void *               _new(const _CCLASS _class, ...);
+void *               _newFromJson(const _CCLASS _class, struct json_object * json);
 void                 delete(void * _object);
 struct json_object * toJson(void * _object);
 int                  isObject(void * _object);
-int                  _instanceOf(const void * _class, void * _object);
+int                  _instanceOf(const _CCLASS _class, void * _object);
 
 #define new(class, ...) _new((__##class), __VA_ARGS__)
 #define newFromJson(class, json) _newFromJson((__##class), (json))
diff --git a/src/Makefile.am b/src/Makefile.am
index 73888f9..fcf1dfa 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,5 +2,5 @@ ACLOCAL_AMFLAGS = -I m4
 
 lib_LTLIBRARIES     = libtoken.la
 libtoken_la_SOURCES = cclass.c crypt.c dyntype.c dyntype/hash.c packet.c
-libtoken_la_CFLAGS  = -I ../include
+libtoken_la_CFLAGS  = -Wall -I ../include
 libtoken_la_LDFLAGS = -version-info 0:0:0
diff --git a/src/Makefile.in b/src/Makefile.in
index 84a00fc..7015ef7 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -209,7 +209,7 @@ top_srcdir = @top_srcdir@
 ACLOCAL_AMFLAGS = -I m4
 lib_LTLIBRARIES = libtoken.la
 libtoken_la_SOURCES = cclass.c crypt.c dyntype.c dyntype/hash.c packet.c
-libtoken_la_CFLAGS = -I ../include
+libtoken_la_CFLAGS = -Wall -I ../include
 libtoken_la_LDFLAGS = -version-info 0:0:0
 all: all-am
 
diff --git a/src/cclass.c b/src/cclass.c
index 41bc04b..9b16bb0 100644
--- a/src/cclass.c
+++ b/src/cclass.c
@@ -24,7 +24,7 @@
 
 
 void *
-_new(const void * _class, ...)
+_new(const _CCLASS _class, ...)
 {
     const _CCLASS class = _class;
     void * object       = calloc(1, class->size);
@@ -43,7 +43,7 @@ _new(const void * _class, ...)
 }
 
 void *
-_newFromJson(const void * _class, struct json_object * json)
+_newFromJson(const _CCLASS _class, struct json_object * json)
 {
     const struct CCLASS * class = _class;
     void * object               = calloc(1, class->size);
@@ -91,7 +91,7 @@ isObject(void * _object)
 }
 
 int
-_instanceOf(const void * _class, void * _object)
+_instanceOf(const _CCLASS _class, void * _object)
 {
     const struct CCLASS ** class = _object;
 
diff --git a/tests/Makefile.am b/tests/Makefile.am
index e311c09..3ce9add 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -6,14 +6,14 @@ check_PROGRAMS = cclassTest cryptTest packetTest
 
 cclassTest_SOURCES = runtest.c cclassTest.c mock/class.c ../src/cclass.c
 cclassTest_LDADD   = $(LIBOBJS)
-cclassTest_CFLAGS  = -I ../include -I .. -I .
+cclassTest_CFLAGS  = -Wall -I ../include -I .. -I .
 
 cryptTest_SOURCES = runtest.c cryptTest.c ../src/cclass.c ../src/crypt.c
 cryptTest_LDADD   = $(LIBOBJS)
-cryptTest_CFLAGS  = -I ../include -I .. -I .
+cryptTest_CFLAGS  = -Wall -I ../include -I .. -I .
 
 packetTest_SOURCES = runtest.c packetTest.c ../src/cclass.c ../src/packet.c ../src/dyntype.c ../src/dyntype/hash.c
 packetTest_LDADD   = $(LIBOBJS)
-packetTest_CFLAGS  = -I ../include -I .. -I .
+packetTest_CFLAGS  = -Wall -I ../include -I .. -I .
 
 EXTRA_DIST = runtest.h mock/class.h
diff --git a/tests/Makefile.in b/tests/Makefile.in
index 6ab3cf7..1a22ea4 100644
--- a/tests/Makefile.in
+++ b/tests/Makefile.in
@@ -210,13 +210,13 @@ ACLOCAL_AMFLAGS = -I m4
 TESTS_ENVIRONMENT = valgrind --error-exitcode=123 --leak-check=full --quiet
 cclassTest_SOURCES = runtest.c cclassTest.c mock/class.c ../src/cclass.c
 cclassTest_LDADD = $(LIBOBJS)
-cclassTest_CFLAGS = -I ../include -I .. -I .
+cclassTest_CFLAGS = -Wall -I ../include -I .. -I .
 cryptTest_SOURCES = runtest.c cryptTest.c ../src/cclass.c ../src/crypt.c
 cryptTest_LDADD = $(LIBOBJS)
-cryptTest_CFLAGS = -I ../include -I .. -I .
+cryptTest_CFLAGS = -Wall -I ../include -I .. -I .
 packetTest_SOURCES = runtest.c packetTest.c ../src/cclass.c ../src/packet.c ../src/dyntype.c ../src/dyntype/hash.c
 packetTest_LDADD = $(LIBOBJS)
-packetTest_CFLAGS = -I ../include -I .. -I .
+packetTest_CFLAGS = -Wall -I ../include -I .. -I .
 EXTRA_DIST = runtest.h mock/class.h
 all: all-am