diff --git a/acinclude.m4 b/acinclude.m4
index 2085f0bb5b8..aadf4c06ee8 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2963,12 +2963,12 @@ dnl Generate Makefile.objects entries
   cat>>Makefile.objects<<EOF
 
 $ac_bdir[$]ac_hdrobj: $abs_srcdir/$ac_provsrc
-	dtrace -h -C -s $ac_srcdir[$]ac_provsrc -o \$[]@ && \$(SED) -ibak 's,PHP_,DTRACE_,g' \$[]@
+	CFLAGS="\$(CFLAGS_CLEAN)" dtrace -h -C -s $ac_srcdir[$]ac_provsrc -o \$[]@ && \$(SED) -ibak 's,PHP_,DTRACE_,g' \$[]@
 
 \$(PHP_DTRACE_OBJS): $ac_bdir[$]ac_hdrobj
 
 $ac_bdir[$]ac_provsrc.o: \$(PHP_DTRACE_OBJS)
-	dtrace -G -o \$[]@ -s $abs_srcdir/$ac_provsrc $dtrace_objs
+	CFLAGS="\$(CFLAGS_CLEAN)" dtrace -G -o \$[]@ -s $abs_srcdir/$ac_provsrc $dtrace_objs
 
 EOF
 ])