diff --git a/smoldyn-2.38/source/lib/SimCommand.c b/smoldyn-2.38/source/lib/SimCommand.c
index f7bbf2173..7641d309f 100644
--- a/smoldyn-2.38/source/lib/SimCommand.c
+++ b/smoldyn-2.38/source/lib/SimCommand.c
@@ -451,7 +451,7 @@ int scmdnextcmdtime(cmdssptr cmds,double time,Q_LONGLONG iter,enum CMDcode type,
 /* scmdoutput */
 void scmdoutput(cmdssptr cmds) {
 	int fid,i;
-	queue cmdq;
+	queue_c cmdq;
 	cmdptr cmd;
 	void* voidptr;
 	char string[STRCHAR],string2[STRCHAR];
diff --git a/smoldyn-2.38/source/lib/SimCommand.h b/smoldyn-2.38/source/lib/SimCommand.h
index e7a4836a5..3ea9960b8 100644
--- a/smoldyn-2.38/source/lib/SimCommand.h
+++ b/smoldyn-2.38/source/lib/SimCommand.h
@@ -32,8 +32,8 @@ typedef struct cmdstruct {
 	} *cmdptr;
 
 typedef struct cmdsuperstruct {
-	queue cmd;						// queue of normal run-time commands
-	queue cmdi;						// queue of integer time commands
+	queue_c cmd;						// queue of normal run-time commands
+	queue_c cmdi;						// queue of integer time commands
 	enum CMDcode (*cmdfn)(void*,cmdptr,char*);	// function that runs commands
 	void *cmdfnarg;				// function argument (e.g. sim)
 	int iter;							// number of times integer commands have run
diff --git a/smoldyn-2.38/source/lib/queue.c b/smoldyn-2.38/source/lib/queue.c
index 9607d4509..7bd3196b6 100644
--- a/smoldyn-2.38/source/lib/queue.c
+++ b/smoldyn-2.38/source/lib/queue.c
@@ -9,12 +9,12 @@ of the Gnu Lesser General Public License (LGPL). */
 
 #define CHECK(A) if(!(A)) {goto failure;} else (void)0
 
-queue q_alloc(int n,enum Q_types type,int (*keycmp)(void *,void *)) {
-	queue q;
+queue_c q_alloc(int n,enum Q_types type,int (*keycmp)(void *,void *)) {
+	queue_c q;
 	int i;
 
 	if(n<0) return NULL;
-	q=(queue) malloc(sizeof(struct qstruct));
+	q=(queue_c) malloc(sizeof(struct qstruct));
 	if(!q) return NULL;
 
 	q->type=type;
@@ -52,7 +52,7 @@ queue q_alloc(int n,enum Q_types type,int (*keycmp)(void *,void *)) {
 
 
 
-int q_expand(queue q,int addspace) {
+int q_expand(queue_c q,int addspace) {
 	int i,j,num,nnew;
 	void **xnew,**kvnew;
 	int *kinew;
@@ -111,7 +111,7 @@ int q_expand(queue q,int addspace) {
 
 
 
-void q_free(queue q,int freek,int freex) {
+void q_free(queue_c q,int freek,int freex) {
 	int i;
 
 	if(!q) return;
@@ -128,12 +128,12 @@ void q_free(queue q,int freek,int freex) {
 
 
 
-void q_null(queue q) {
+void q_null(queue_c q) {
 	q->f=q->b=0; }
 
 
 
-int q_enqueue(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
+int q_enqueue(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q) {
 	int sp;
 
 	if(q->type==Qvoid) q->kv[q->b]=kv;
@@ -148,7 +148,7 @@ int q_enqueue(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
 
 
 
-int q_push(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
+int q_push(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q) {
 	int sp;
 
 	q->f=(q->n+q->f-1)%q->n;
@@ -163,7 +163,7 @@ int q_push(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
 
 
 
-int q_insert(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
+int q_insert(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q) {
 	int i,n,sp,im1;
 
 	n=q->n;
@@ -197,7 +197,7 @@ int q_insert(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q) {
 
 
 
-void q_front(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr) {
+void q_front(queue_c q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr) {
 	if(q->f==q->b) {
 		if(kvptr) *kvptr=NULL;
 		if(kiptr) *kiptr=0;
@@ -214,7 +214,7 @@ void q_front(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,voi
 
 
 
-int q_pop(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr) {
+int q_pop(queue_c q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr) {
 	if(q->f==q->b) {
 		if(kvptr) *kvptr=NULL;
 		if(kiptr) *kiptr=0;
@@ -233,17 +233,17 @@ int q_pop(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void *
 
 
 
-int q_length(queue q) {
+int q_length(queue_c q) {
 	return (q->n+q->b-q->f)%q->n; }
 
 
 
-int q_maxlength(queue q) {
+int q_maxlength(queue_c q) {
 	return q->n-1; }
 
 
 
-int q_next(int i,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr,queue q) {
+int q_next(int i,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr,queue_c q) {
 	int f,b;
 
 	f=q->f;
diff --git a/smoldyn-2.38/source/lib/queue.h b/smoldyn-2.38/source/lib/queue.h
index 80909c640..f4828445e 100644
--- a/smoldyn-2.38/source/lib/queue.h
+++ b/smoldyn-2.38/source/lib/queue.h
@@ -30,25 +30,25 @@ typedef struct qstruct{
 	void **x;
 	int n;
 	int f;
-	int b; } *queue;
+	int b; } *queue_c;
 
 #define q_frontkeyV(q) ((q)->b==(q)->f?NULL:(q)->kv[(q)->f])
 #define q_frontkeyI(q) ((q)->b==(q)->f?0:(q)->ki[(q)->f])
 #define q_frontkeyD(q) ((q)->b==(q)->f?0:(q)->kd[(q)->f])
 #define q_frontkeyL(q) ((q)->b==(q)->f?0:(q)->kl[(q)->f])
 
-queue q_alloc(int n,enum Q_types type,int (*keycmp)(void *,void *));
-int q_expand(queue q,int addspace);
-void q_free(queue q,int freek,int freex);
-void q_null(queue q);
-int q_enqueue(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q);
-int q_push(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q);
-int q_insert(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue q);
-void q_front(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr);
-int q_pop(queue q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr);
-int q_length(queue q);
-int q_maxlength(queue q);
-int q_next(int i,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr,queue q);
+queue_c q_alloc(int n,enum Q_types type,int (*keycmp)(void *,void *));
+int q_expand(queue_c q,int addspace);
+void q_free(queue_c q,int freek,int freex);
+void q_null(queue_c q);
+int q_enqueue(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q);
+int q_push(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q);
+int q_insert(void *kv,int ki,double kd,Q_LONGLONG kl,void *x,queue_c q);
+void q_front(queue_c q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr);
+int q_pop(queue_c q,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr);
+int q_length(queue_c q);
+int q_maxlength(queue_c q);
+int q_next(int i,void **kvptr,int *kiptr,double *kdptr,Q_LONGLONG *klptr,void **xptr,queue_c q);
 
 #endif