Speaking in Warsaw on Tuesday, Tusk said Poland would call for urgent consultations within the European Union in response to Berlin's decision, news agencies reported.
Addressing a gathering of Polish ambassadors from around the world, Tusk urged more support for Warsaw's efforts to prevent illegal migrants from entering the EU, Polish state news agency PAP reported.
The Reuters news agency noted that relations between Poland and Germany have improved since a pro-European coalition led by Tusk took power in December, but it said there is growing frustration in Warsaw over Berlin's reluctance to support joint EU financing for defence and bolstering the bloc's eastern border.
Germany on Monday announced plans to impose tighter controls at all of its land borders for six months starting September 16, Reuters reported.
"Such actions are unacceptable from the Polish point of view," Tusk said on Tuesday.
"Today we need full support from Germany and the entire EU when it comes to ... reinforcing the eastern border, including in the context of illegal migration," he added.
Tusk argued that Poland needed greater support from Berlin and other EU capitals to secure the bloc's external border, rather than stricter controls along its border with Germany.
He announced that Poland would "contact other countries affected by Berlin's decisions for urgent consultations on action at the EU level."
Poland and Germany are both part of the EU's Schengen passport-free zone.
Poland has been facing a migrant crisis on its eastern border with Belarus since 2021.
(gs)
Source: IAR, PAP, Reuters
Click on the audio player above for a report by Radio Poland's Michał Owczarek.