diff --git a/CHANGES b/CHANGES
index ed77f6d8a..a18f456b1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.9.1: (Future)
+Emulation fixes:
+ - GBA Memory: Fix loading Thumb savestates when in ARM mode
+
 0.9.0: (2021-03-28)
 Features:
  - e-Reader card scanning
diff --git a/src/gba/memory.c b/src/gba/memory.c
index e6e3a6b2d..e93b57743 100644
--- a/src/gba/memory.c
+++ b/src/gba/memory.c
@@ -345,7 +345,7 @@ static void GBASetActiveRegion(struct ARMCore* cpu, uint32_t address) {
 	cpu->memory.activeSeqCycles16 = memory->waitstatesSeq16[memory->activeRegion];
 	cpu->memory.activeNonseqCycles32 = memory->waitstatesNonseq32[memory->activeRegion];
 	cpu->memory.activeNonseqCycles16 = memory->waitstatesNonseq16[memory->activeRegion];
-	cpu->memory.activeMask &= -(cpu->executionMode == MODE_THUMB ? WORD_SIZE_THUMB : WORD_SIZE_ARM);
+	cpu->memory.activeMask &= -(cpu->cpsr.t ? WORD_SIZE_THUMB : WORD_SIZE_ARM);
 }
 
 #define LOAD_BAD \