diff --git a/src/Makefile b/src/Makefile
index 2127c22..0be6f07 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,7 +20,7 @@ else
 endif
 
 _LDFLAGS=$(LDFLAGS) -L. $(shell pkg-config --libs glib-2.0) $(FORCE_RPATH_STR)
-_CFLAGS=$(CFLAGS) -I. $(shell pkg-config --cflags glib-2.0) -fPIC -Wall -std=c99 -Wextra -pedantic -Werror -Wshadow -Wstrict-overflow -fno-strict-aliasing -DG_LOG_DOMAIN=\"log_proxy\" $(DEBUG_CFLAGS) $(COVERAGE_CFLAGS)
+_CFLAGS=$(CFLAGS) -I. $(shell pkg-config --cflags glib-2.0) -fPIC -Wall -std=c99 -Wextra -pedantic -Werror -Wshadow -Wstrict-overflow -Wno-cast-function-type -fno-strict-aliasing -DG_LOG_DOMAIN=\"log_proxy\" $(DEBUG_CFLAGS) $(COVERAGE_CFLAGS)
 
 CC=gcc