diff --git a/package/tremor/tremor.mk b/package/tremor/tremor.mk
index 97b0ce36e4..2a791b6729 100644
--- a/package/tremor/tremor.mk
+++ b/package/tremor/tremor.mk
@@ -16,9 +16,17 @@ TREMOR_DEPENDENCIES = libogg
 
 # tremor has ARM assembly code that cannot be compiled in Thumb2 mode,
 # so we must force the traditional ARM mode.
+# However, some ARM architectures like ARNv7-M only supports Thumb
+# instructions, but the tremor build configuration enables ARM assembly
+# code unconditionally for all arm triplets by defining _ARM_ASSEM_.
+# We are overriding this by undefining this macro for the ARM
+# architectures not supporting ARM instructions.
 ifeq ($(BR2_arm),y)
-TREMOR_CONF_ENV = \
-	CFLAGS="$(TARGET_CFLAGS) -marm"
+ifeq ($(BR2_ARM_CPU_HAS_ARM),y)
+TREMOR_CONF_ENV = CFLAGS="$(TARGET_CFLAGS) -marm"
+else
+TREMOR_CONF_ENV = CFLAGS="$(TARGET_CFLAGS) -U_ARM_ASSEM_"
+endif
 endif
 
 $(eval $(autotools-package))