diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -13,14 +13,14 @@
 #
 elf-vdso.so.o			standard				\
 	dependency	"$S/amd64/amd64/sigtramp.S assym.inc $S/conf/vdso_amd64.ldscript $S/tools/amd64_vdso.sh" \
-	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' DEBUG='${DEBUG}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_vdso.sh" \
+	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_vdso.sh" \
 	no-ctfconvert	\
 	no-implicit-rule before-depend	\
 	clean		"elf-vdso.so.o elf-vdso.so.1 vdso_offsets.h sigtramp.pico"
 #
 elf-vdso32.so.o			optional	compat_freebsd32		\
 	dependency	"$S/amd64/ia32/ia32_sigtramp.S ia32_assym.h $S/conf/vdso_amd64_ia32.ldscript $S/tools/amd64_ia32_vdso.sh" \
-	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' DEBUG='${DEBUG}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_ia32_vdso.sh" \
+	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_ia32_vdso.sh" \
 	no-ctfconvert	\
 	no-implicit-rule before-depend	\
 	clean		"elf-vdso32.so.o elf-vdso32.so.1 vdso_ia32_offsets.h ia32_sigtramp.pico"
diff --git a/sys/tools/amd64_ia32_vdso.sh b/sys/tools/amd64_ia32_vdso.sh
--- a/sys/tools/amd64_ia32_vdso.sh
+++ b/sys/tools/amd64_ia32_vdso.sh
@@ -58,7 +58,7 @@
     exit 1
 fi
 
-${CC} ${DEBUG} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
+${CC} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
    -o elf-vdso32.so.o -I. -I"${S}" -include opt_global.h \
    -DVDSO_NAME=elf_vdso32_so_1 -DVDSO_FILE=\"elf-vdso32.so.1\" \
    "${S}"/tools/vdso_wrap.S
diff --git a/sys/tools/amd64_vdso.sh b/sys/tools/amd64_vdso.sh
--- a/sys/tools/amd64_vdso.sh
+++ b/sys/tools/amd64_vdso.sh
@@ -67,7 +67,7 @@
     exit 1
 fi
 
-${CC} ${DEBUG} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
+${CC} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
    -o elf-vdso.so.o -I. -I"${S}" -include opt_global.h \
    -DVDSO_NAME=elf_vdso_so_1 -DVDSO_FILE=\"elf-vdso.so.1\" \
    "${S}"/tools/vdso_wrap.S