diff --git a/test/misc/Makefile b/test/misc/Makefile
index 7a1b82d5f..3142dcfb8 100644
--- a/test/misc/Makefile
+++ b/test/misc/Makefile
@@ -108,6 +108,14 @@ $(WORKDIR)/bug1265.$1.$2.prg: bug1265.c | $(WORKDIR)
 	$(LD65) -t sim$2 -o $$@ $$(@:.prg=.o) sim$2.lib $(NULLERR)
 	$(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT) $(NULLERR)
 
+# this one fails with optimizations, without OptBoolTrans it works
+$(WORKDIR)/bug1397.$1.$2.prg: bug1397.c | $(WORKDIR)
+	$(if $(QUIET),echo misc/bug1397.$1.$2.prg)
+	$(CC65) -O --disable-opt OptBoolTrans -t sim$2 -$1 -o $$(@:.prg=.s) $$< $(NULLERR)
+	$(CA65) -t sim$2 -o $$(@:.prg=.o) $$(@:.prg=.s) $(NULLERR)
+	$(LD65) -t sim$2 -o $$@ $$(@:.prg=.o) sim$2.lib $(NULLERR)
+	$(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT) $(NULLERR)
+
 # should compile, but then hangs in an endless loop
 $(WORKDIR)/endless.$1.$2.prg: endless.c | $(WORKDIR)
 	$(if $(QUIET),echo misc/endless.$1.$2.prg)
diff --git a/test/misc/bug1397.c b/test/misc/bug1397.c
new file mode 100644
index 000000000..4f8fb8697
--- /dev/null
+++ b/test/misc/bug1397.c
@@ -0,0 +1,55 @@
+
+/* bug #1937 - Incorrect Behavior Related to OptBoolTrans */
+
+#include <stdio.h>
+
+unsigned char c;
+int *p;
+
+void f1(void) {
+	int i = 1;
+	int *pa = (int *)0xaaaa;
+	int *pb = (int *)0xbbbb;
+
+	p = (i == 0) ? pa : pb;
+	c = 0x5a;	
+}
+
+
+struct data_t {
+	unsigned char c;
+	int *p;	
+};
+
+struct data_t data;
+
+void f2(void) {
+	int i = 1;
+	int *pa = (int *)0xcccc;
+	int *pb = (int *)0xdddd;
+	struct data_t *po = &data;
+	
+ 	po->p = (i == 0) ? pa : pb;
+ 	po->c = 0xa5;	
+}
+
+int ret = 0;
+
+int main(void) {
+	f1();
+    if (c != 0x5a) {
+        ret++;
+    }
+	printf("c: %hhx\n", c);
+	printf("p: %p\n", p);
+	f2();
+    if (data.c != 0xa5) {
+        ret++;
+    }
+	printf("c: %hhx\n", data.c);
+	printf("p: %p\n", data.p);
+
+	printf("failures: %d\n", ret);
+    return ret;
+}
+