1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 1a6e733..ca5f90b 100644
--- a/Makefile
+++ b/Makefile
@@ -210,7 +210,7 @@ include Makefile.common
 
 OBJECTS := $(SOURCES_C:.c=.o) $(SOURCES_ASM:.S=.o)
 
-DEFINES = -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -DPC_BUILD -Wall
+DEFINES = -DHAVE_STRINGS_H -DHAVE_STDINT_H -DHAVE_INTTYPES_H -D__LIBRETRO__ -DINLINE=inline -DPC_BUILD -Wall -Werror=implicit-function-declaration
 
 ifeq ($(CPU_ARCH), arm)
 DEFINES += -DARM_ARCH