diff --git a/src/asm/main.c b/src/asm/main.c
index ad59fe9b..a57f37b7 100644
--- a/src/asm/main.c
+++ b/src/asm/main.c
@@ -182,7 +182,7 @@ int main(int argc, char *argv[])
 		switch (ch) {
 		case 'b':
 			if (strlen(musl_optarg) == 2)
-				opt_B(&musl_optarg[1]);
+				opt_B(musl_optarg);
 			else
 				errx("Must specify exactly 2 characters for option 'b'");
 			break;
@@ -204,7 +204,7 @@ int main(int argc, char *argv[])
 
 		case 'g':
 			if (strlen(musl_optarg) == 4)
-				opt_G(&musl_optarg[1]);
+				opt_G(musl_optarg);
 			else
 				errx("Must specify exactly 4 characters for option 'g'");
 			break;
diff --git a/test/asm/opt-b.asm b/test/asm/opt-b.asm
index 4b102ee1..b1827925 100644
--- a/test/asm/opt-b.asm
+++ b/test/asm/opt-b.asm
@@ -1,2 +1,4 @@
+PRINTLN %Oo_Oo_Oo
+
 OPT b.X
-PRINTLN %..X.X.X.
+PRINTLN %..X._X.X.
diff --git a/test/asm/opt-b.flags b/test/asm/opt-b.flags
new file mode 100644
index 00000000..0e6951e7
--- /dev/null
+++ b/test/asm/opt-b.flags
@@ -0,0 +1 @@
+-Weverything -b oO
diff --git a/test/asm/opt-b.out b/test/asm/opt-b.out
index 72555870..11227d1f 100644
--- a/test/asm/opt-b.out
+++ b/test/asm/opt-b.out
@@ -1 +1,2 @@
 $2A
+$2A
diff --git a/test/asm/opt-g.asm b/test/asm/opt-g.asm
index 660eb249..a94c8bf7 100644
--- a/test/asm/opt-g.asm
+++ b/test/asm/opt-g.asm
@@ -1,2 +1,4 @@
+PRINTLN `pqpq_rsrs
+
 OPT g.x0X
-PRINTLN `.x.x0X0X
+PRINTLN `.x.x_0X0X
diff --git a/test/asm/opt-g.flags b/test/asm/opt-g.flags
new file mode 100644
index 00000000..2135a091
--- /dev/null
+++ b/test/asm/opt-g.flags
@@ -0,0 +1 @@
+-Weverything -g pqrs
diff --git a/test/asm/opt-g.out b/test/asm/opt-g.out
index 78f6c0a7..a659e3b0 100644
--- a/test/asm/opt-g.out
+++ b/test/asm/opt-g.out
@@ -1 +1,2 @@
 $F55
+$F55