diff --git a/channels/iax2-parser.c b/channels/iax2-parser.c
index a4a81e20c899601ace144975cae33ccb21e0068c..14cac4836b7db5b4bf107295a51a71dfbd96aabc 100644
--- a/channels/iax2-parser.c
+++ b/channels/iax2-parser.c
@@ -55,11 +55,11 @@ static void frame_cache_cleanup(void *data);
 
 /*! \brief A per-thread cache of iax_frame structures */
 AST_THREADSTORAGE_CUSTOM(frame_cache, NULL, frame_cache_cleanup);
-#endif
 
 /*! \brief This is just so iax_frames, a list head struct for holding a list of
  *  iax_frame structures, is defined. */
 AST_LIST_HEAD_NOLOCK(iax_frames, iax_frame);
+#endif
 
 static void internaloutput(const char *str)
 {
diff --git a/codecs/Makefile b/codecs/Makefile
index df527ff7cc2839385d2e31ea390ce08d2165bb0d..776f8747fe6ffb4b37b4952748c5349d884fb742 100644
--- a/codecs/Makefile
+++ b/codecs/Makefile
@@ -31,7 +31,7 @@ all: _all
 
 include $(ASTTOPDIR)/Makefile.moddir_rules
 
-ifneq ($(GSM_INTERNAL),)
+ifneq ($(GSM_INTERNAL),no)
 GSM_INCLUDE:=-Igsm/inc
 $(if $(filter codec_gsm,$(EMBEDDED_MODS)),modules.link,codec_gsm.so): gsm/lib/libgsm.a
 endif
diff --git a/main/frame.c b/main/frame.c
index ba796d1748426ed8d3469c314300357cfc7f2006..f8935db5c6f026a9750b32e57802565c3f922f07 100644
--- a/main/frame.c
+++ b/main/frame.c
@@ -49,6 +49,7 @@ static int headers;
 static AST_LIST_HEAD_STATIC(headerlist, ast_frame);
 #endif
 
+#if !defined(LOW_MEMORY)
 static void frame_cache_cleanup(void *data);
 
 /*! \brief A per-thread cache of frame headers */
@@ -73,6 +74,7 @@ struct ast_frame_cache {
 	struct ast_frames list;
 	size_t size;
 };
+#endif
 
 #define SMOOTHER_SIZE 8000
 
@@ -288,6 +290,8 @@ void ast_smoother_free(struct ast_smoother *s)
 static struct ast_frame *ast_frame_header_new(void)
 {
 	struct ast_frame *f;
+
+#if !defined(LOW_MEMORY)
 	struct ast_frame_cache *frames;
 
 	if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
@@ -300,6 +304,7 @@ static struct ast_frame *ast_frame_header_new(void)
 			return f;
 		}
 	}
+#endif
 
 	if (!(f = ast_calloc_cache(1, sizeof(*f))))
 		return NULL;
@@ -315,6 +320,7 @@ static struct ast_frame *ast_frame_header_new(void)
 	return f;
 }
 
+#if !defined(LOW_MEMORY)
 static void frame_cache_cleanup(void *data)
 {
 	struct ast_frame_cache *frames = data;
@@ -325,12 +331,14 @@ static void frame_cache_cleanup(void *data)
 	
 	free(frames);
 }
+#endif
 
 void ast_frame_free(struct ast_frame *fr, int cache)
 {
 	if (!fr->mallocd)
 		return;
 
+#if !defined(LOW_MEMORY)
 	if (cache && fr->mallocd == AST_MALLOCD_HDR) {
 		/* Cool, only the header is malloc'd, let's just cache those for now 
 		 * to keep things simple... */
@@ -343,6 +351,7 @@ void ast_frame_free(struct ast_frame *fr, int cache)
 			return;
 		}
 	}
+#endif
 	
 	if (fr->mallocd & AST_MALLOCD_DATA) {
 		if (fr->data) 
@@ -426,11 +435,14 @@ struct ast_frame *ast_frisolate(struct ast_frame *fr)
 
 struct ast_frame *ast_frdup(const struct ast_frame *f)
 {
-	struct ast_frame_cache *frames;
 	struct ast_frame *out = NULL;
 	int len, srclen = 0;
 	void *buf = NULL;
 
+#if !defined(LOW_MEMORY)
+	struct ast_frame_cache *frames;
+#endif
+
 	/* Start with standard stuff */
 	len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
 	/* If we have a source, add space for it */
@@ -443,6 +455,7 @@ struct ast_frame *ast_frdup(const struct ast_frame *f)
 	if (srclen > 0)
 		len += srclen + 1;
 	
+#if !defined(LOW_MEMORY)
 	if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
 		AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
 			if (out->mallocd_hdr_len >= len) {
@@ -457,6 +470,8 @@ struct ast_frame *ast_frdup(const struct ast_frame *f)
 		}
 		AST_LIST_TRAVERSE_SAFE_END
 	}
+#endif
+
 	if (!buf) {
 		if (!(buf = ast_calloc_cache(1, len)))
 			return NULL;