[Avodah] Rambam Hilchot Trumot

[Ben Waxman]

The last halacha in the Rambam's Hilchot Truma states the anyone eating 
trumah says an additional bracha (v'tzivanu l'achol truma). He adds that 
"qibalnu v'ra'inu" people say this bracha even if they eat challa of 
chutz l'aretz.

Qibalnu I understand but what does the Rambam mean when says that "we've 
seen people say this bracha on challa of chutz l'aretz"?

Ben