diff --git a/net/asterisk-11.x/Makefile b/net/asterisk-11.x/Makefile
index e83f554..12d8a04 100644
--- a/net/asterisk-11.x/Makefile
+++ b/net/asterisk-11.x/Makefile
@@ -323,8 +323,8 @@ define Build/Compile
 	$(MAKE) -C "$(PKG_BUILD_DIR)" include/asterisk/version.h \
 		include/asterisk/buildopts.h defaults.h \
 		makeopts.embed_rules
-	ASTCFLAGS="$(EXTRA_CFLAGS) -DLOW_MEMORY"
-	ASTLDFLAGS="$(EXTRA_LDFLAGS)"
+	ASTCFLAGS="$(EXTRA_CFLAGS) -DLOW_MEMORY" \
+	ASTLDFLAGS="$(EXTRA_LDFLAGS)" \
 	$(MAKE) -C "$(PKG_BUILD_DIR)" \
 		ASTVARLIBDIR="/usr/lib/asterisk" \
 		ASTDATADIR="/usr/lib/asterisk" \
diff --git a/net/asterisk-13.x/Makefile b/net/asterisk-13.x/Makefile
index a3b7361..71beebc 100644
--- a/net/asterisk-13.x/Makefile
+++ b/net/asterisk-13.x/Makefile
@@ -264,8 +264,8 @@ define Build/Compile
 	$(MAKE) -C "$(PKG_BUILD_DIR)" \
 		include/asterisk/version.h \
 		include/asterisk/buildopts.h defaults.h
-	ASTCFLAGS="$(EXTRA_CFLAGS) -DLOW_MEMORY"
-	ASTLDFLAGS="$(EXTRA_LDFLAGS)"
+	ASTCFLAGS="$(EXTRA_CFLAGS) -DLOW_MEMORY" \
+	ASTLDFLAGS="$(EXTRA_LDFLAGS)" \
 	$(MAKE) -C "$(PKG_BUILD_DIR)" \
 		ASTVARLIBDIR="/usr/lib/asterisk" \
 		ASTDATADIR="/usr/lib/asterisk" \