diff --git a/configure.ac b/configure.ac
index 2b5b9e5ae..8044d3002 100644
--- a/configure.ac
+++ b/configure.ac
@@ -418,6 +418,18 @@ fi
 
 AM_CONDITIONAL([ASYNCEXCEPT], [[[[ $asyncexcept = "yes" ]]]])
 
+dnl
+dnl Low memory compilation mode
+dnl
+
+AC_ARG_ENABLE(lowmem-compile, AC_HELP_STRING([--enable-lowmem-compile], [Enable low-memory compilation options]),
+[
+	lowmem_compile="yes"
+], [
+	lowmem_compile="no"
+])
+
+AM_CONDITIONAL([LOWMEM_COMPILE], [[[[ $lowmem_compile = "yes" ]]]])
 
 dnl
 dnl Optimization
diff --git a/ircd/Makefile.am b/ircd/Makefile.am
index ef9136ebc..ad0f7e7c8 100644
--- a/ircd/Makefile.am
+++ b/ircd/Makefile.am
@@ -160,10 +160,12 @@ endif
 # (>= 2 GiB) which can thrash small systems and even sometimes crash GCC.
 # This option reduces memory consumption at the cost of compilation speed.
 if GCC
-json.lo:      CXXFLAGS += --param ggc-min-expand=3
-#http.lo:      CXXFLAGS += --param ggc-min-expand=15
-#rfc3986.lo:   CXXFLAGS += --param ggc-min-expand=15
-#rfc1459.lo:   CXXFLAGS += --param ggc-min-expand=15
-#m_id.lo:      CXXFLAGS += --param ggc-min-expand=15
-#fmt.lo:       CXXFLAGS += --param ggc-min-expand=15
+if LOWMEM_COMPILE
+json.lo:     CXXFLAGS += --param ggc-min-expand=1
+http.lo:     CXXFLAGS += --param ggc-min-expand=1
+fmt.lo:      CXXFLAGS += --param ggc-min-expand=1
+rfc3986.lo:  CXXFLAGS += --param ggc-min-expand=1
+rfc1459.lo:  CXXFLAGS += --param ggc-min-expand=1
+m_id.lo:     CXXFLAGS += --param ggc-min-expand=1
+endif
 endif