diff --git a/src/Makefile.am b/src/Makefile.am
index 8862b3ad..688d730a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -28,7 +28,7 @@ INCLUDES=$(XAPIAN_CXXFLAGS) $(GMIME_CFLAGS) $(GLIB_CFLAGS)
 # don't use -Werror, as it might break on other compilers
 # use -Wno-unused-parameters, because some callbacks may not
 # really need all the params they get
-AM_CFLAGS=-Wall -Wextra -Wno-unused-parameter
+AM_CFLAGS=-Wall -Wextra -Wno-unused-parameter -Wdeclaration-after-statement
 AM_CXXFLAGS=-Wall -Wextra -Wno-unused-parameter
 
 bin_PROGRAMS=				\