diff --git a/ChangeLog b/ChangeLog
index 065c3d362..6463c8521 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-11-13  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/kern/arm/misc.S: Add __muldi3 and __aeabi_lmul. Those
+	helper functions are needed for thumb.
+
 2013-11-13  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/disk/diskfilter.c (grub_diskfilter_make_raid): Make
diff --git a/grub-core/kern/arm/misc.S b/grub-core/kern/arm/misc.S
index 94522c222..8420a2aed 100644
--- a/grub-core/kern/arm/misc.S
+++ b/grub-core/kern/arm/misc.S
@@ -30,6 +30,33 @@
 
 	.align	2
 
+FUNCTION(__muldi3)
+FUNCTION(__aeabi_lmul)
+        stmfd   sp!, {r4, fp}
+        add     fp, sp, #4
+        sub     sp, sp, #16
+        str     r0, [fp, #-12]
+        str     r1, [fp, #-8]
+        str     r2, [fp, #-20]
+        str     r3, [fp, #-16]
+        ldr     r3, [fp, #-8]
+        ldr     r2, [fp, #-20]
+        .long   0xe0020293   @ mul     r2, r3, r2
+        ldr     r3, [fp, #-16]
+        ldr     r1, [fp, #-12]
+        .long   0xe0030391   @ mul     r3, r1, r3
+        add     r2, r2, r3
+        ldr     r0, [fp, #-12]
+        ldr     r1, [fp, #-20]
+        umull   r3, r4, r0, r1
+        add     r2, r2, r4
+        mov     r4, r2
+        mov     r0, r3
+        mov     r1, r4
+        sub     sp, fp, #4
+        ldmfd   sp!, {r4, fp}
+        bx      lr
+
 	.macro division parent
 
         stmfd   sp!, {lr}
diff --git a/include/grub/misc.h b/include/grub/misc.h
index c62d4fbeb..8b0f33972 100644
--- a/include/grub/misc.h
+++ b/include/grub/misc.h
@@ -469,6 +469,12 @@ EXPORT_FUNC (__aeabi_uidiv) (grub_uint32_t a, grub_uint32_t b);
 grub_uint32_t
 EXPORT_FUNC (__aeabi_uidivmod) (grub_uint32_t a, grub_uint32_t b);
 
+/* Needed for allowing modules to be compiled as thumb.  */
+grub_uint64_t
+EXPORT_FUNC (__muldi3) (grub_uint64_t a, grub_uint64_t b);
+grub_uint64_t
+EXPORT_FUNC (__aeabi_lmul) (grub_uint64_t a, grub_uint64_t b);
+
 #endif
 
 #if defined (__ia64__)