diff --git a/src/arm/isa-arm.c b/src/arm/isa-arm.c
index 01fa67baa..fea797e73 100644
--- a/src/arm/isa-arm.c
+++ b/src/arm/isa-arm.c
@@ -530,6 +530,7 @@ void ARMStep(struct ARMCore* cpu) {
 	DEFINE_INSTRUCTION_ARM(NAME, \
 		int rn = (opcode >> 16) & 0xF; \
 		int rs = opcode & 0x0000FFFF; \
+		int writeback = 1; \
 		int m; \
 		int i; \
 		int total = 0; \
@@ -537,9 +538,11 @@ void ARMStep(struct ARMCore* cpu) {
 		S_PRE; \
 		LOOP(BODY); \
 		S_POST; \
-		WRITEBACK; \
 		currentCycles += cpu->memory->waitMultiple(cpu->memory, addr, total); \
-		POST_BODY;)
+		POST_BODY; \
+		if (writeback) { \
+			WRITEBACK; \
+		})
 
 
 #define DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(NAME, BODY, POST_BODY) \
@@ -699,6 +702,10 @@ DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(LDM,
 	++currentCycles;
 	if (rs & 0x8000) {
 		ARM_WRITE_PC;
+	}
+	int rnx = 1 << rn;
+	if (rnx & rs && ((rnx - 1) & rs)) {
+		writeback = 0;
 	})
 
 DEFINE_LOAD_STORE_MULTIPLE_INSTRUCTION_ARM(STM,