diff --git a/src/gb/core.c b/src/gb/core.c
index cb95bc572..4d322eae0 100644
--- a/src/gb/core.c
+++ b/src/gb/core.c
@@ -873,59 +873,59 @@ static bool _GBCoreReadRegister(const struct mCore* core, const char* name, void
 	uint16_t* value16 = out;
 	uint8_t* value8 = out;
 
-	if (strcmp(name, "b") == 0) {
+	if (strcasecmp(name, "b") == 0) {
 		*value8 = cpu->b;
 		return true;
 	}
-	if (strcmp(name, "c") == 0) {
+	if (strcasecmp(name, "c") == 0) {
 		*value8 = cpu->c;
 		return true;
 	}
-	if (strcmp(name, "d") == 0) {
+	if (strcasecmp(name, "d") == 0) {
 		*value8 = cpu->d;
 		return true;
 	}
-	if (strcmp(name, "e") == 0) {
+	if (strcasecmp(name, "e") == 0) {
 		*value8 = cpu->e;
 		return true;
 	}
-	if (strcmp(name, "a") == 0) {
+	if (strcasecmp(name, "a") == 0) {
 		*value8 = cpu->a;
 		return true;
 	}
-	if (strcmp(name, "f") == 0) {
+	if (strcasecmp(name, "f") == 0) {
 		*value8 = cpu->f.packed;
 		return true;
 	}
-	if (strcmp(name, "h") == 0) {
+	if (strcasecmp(name, "h") == 0) {
 		*value8 = cpu->h;
 		return true;
 	}
-	if (strcmp(name, "l") == 0) {
+	if (strcasecmp(name, "l") == 0) {
 		*value8 = cpu->l;
 		return true;
 	}
-	if (strcmp(name, "bc") == 0) {
+	if (strcasecmp(name, "bc") == 0) {
 		*value16 = cpu->bc;
 		return true;
 	}
-	if (strcmp(name, "de") == 0) {
+	if (strcasecmp(name, "de") == 0) {
 		*value16 = cpu->de;
 		return true;
 	}
-	if (strcmp(name, "hl") == 0) {
+	if (strcasecmp(name, "hl") == 0) {
 		*value16 = cpu->hl;
 		return true;
 	}
-	if (strcmp(name, "af") == 0) {
+	if (strcasecmp(name, "af") == 0) {
 		*value16 = cpu->af;
 		return true;
 	}
-	if (strcmp(name, "pc") == 0) {
+	if (strcasecmp(name, "pc") == 0) {
 		*value16 = cpu->pc;
 		return true;
 	}
-	if (strcmp(name, "sp") == 0) {
+	if (strcasecmp(name, "sp") == 0) {
 		*value16 = cpu->sp;
 		return true;
 	}