diff --git a/pimd/Makefile.am b/pimd/Makefile.am
index f13debd..816afb9 100644
--- a/pimd/Makefile.am
+++ b/pimd/Makefile.am
@@ -39,7 +39,7 @@
 INSTALL_SDATA=@INSTALL@ -m 600
 LIBS = @LIBS@
 
-AM_CFLAGS = $(PICFLAGS)
+AM_CFLAGS = $(PICFLAGS) $(WERROR)
 AM_LDFLAGS = $(PILDFLAGS)
 
 noinst_LIBRARIES = libpim.a