diff --git a/CHANGES b/CHANGES
index 049717040..b45c44b86 100644
--- a/CHANGES
+++ b/CHANGES
@@ -21,6 +21,7 @@ Emulation fixes:
  - GB Video: Fix more window edge cases (fixes mgba.io/i/1346)
  - GB Timer: Fix timing adjustments when writing to TAC (fixes mgba.io/i/1340)
  - GBA Memory: Fix writing to OBJ memory in modes 3 and 5
+ - GBA: Fix RTC on non-standard sized ROMs (fixes mgba.io/i/1400)
 Other fixes:
  - Qt: More app metadata fixes
  - Qt: Fix load recent from archive (fixes mgba.io/i/1325)
diff --git a/src/gba/gba.c b/src/gba/gba.c
index e144ce45a..4434fc526 100644
--- a/src/gba/gba.c
+++ b/src/gba/gba.c
@@ -405,8 +405,6 @@ bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
 	gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
 	gba->memory.mirroring = false;
 	gba->romCrc32 = doCrc32(gba->memory.rom, gba->memory.romSize);
-	GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
-	GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
 	if (popcount32(gba->memory.romSize) != 1) {
 		// This ROM is either a bad dump or homebrew. Emulate flash cart behavior.
 #ifndef FIXED_ROM_BUFFER
@@ -421,6 +419,8 @@ bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
 	if (gba->cpu && gba->memory.activeRegion >= REGION_CART0) {
 		gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
 	}
+	GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
+	GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
 	// TODO: error check
 	return true;
 }