diff --git a/Makefile b/Makefile
index 9aaf773..a69c006 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ OBJ_DIR := obj
 SRCs := $(wildcard $(SRC_DIR)/*.c)
 OBJs := $(SRCs:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
 
-CFLAGS = --std=c99 -O3 -Wall -Werror -Wextra -pedantic
+CFLAGS = --std=c99 -D_POSIX_C_SOURCE=200112L -O3 -Wall -Werror -Wextra -pedantic
 LDFLAGS += -lportaudio -lopus -lsodium
 
 $(TARGET): $(OBJs)
@@ -25,5 +25,5 @@ $(OBJ_DIR):
 	mkdir -p $@
 
 clean:
-	rm ${TARGET}
-	rm obj/*.o
\ No newline at end of file
+	rm -f ${TARGET}
+	rm -f obj/*.o
\ No newline at end of file