Added `-Wdeclaration-after-statement` compilation flag
diff --git a/lib/Makefile b/lib/Makefile
index 75b09e5..76731ab 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -48,7 +48,7 @@
 
 CPPFLAGS= -I./common -DXXH_NAMESPACE=ZSTD_
 CFLAGS ?= -O3
-CFLAGS += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wstrict-prototypes -Wundef
+CFLAGS += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes -Wundef
 FLAGS   = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)