diff --git a/solenv/gbuild/platform/IOS_ARM_GCC.mk b/solenv/gbuild/platform/IOS_ARM_GCC.mk
index a1f0ba042a13..7656bdd99862 100644
--- a/solenv/gbuild/platform/IOS_ARM_GCC.mk
+++ b/solenv/gbuild/platform/IOS_ARM_GCC.mk
@@ -88,7 +88,7 @@ gb_DEBUG_CFLAGS := -g -fno-inline
 # ObjCxxObject class
 
 define gb_ObjCxxObject__command
-$(call gb_Output_announce,$(2),$(true),OCX,3)
+$(call gb_Output_announce,$(2).mm,$(true),OCX,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && \
 	$(gb_CXX) \
@@ -106,7 +106,7 @@ endef
 # ObjCObject class
 
 define gb_ObjCObject__command
-$(call gb_Output_announce,$(2),$(true),OCC,3)
+$(call gb_Output_announce,$(2).m,$(true),OCC,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) && \
 	mkdir -p $(dir $(call gb_ObjCObject_get_dep_target,$(2))) && \
diff --git a/solenv/gbuild/platform/macosx.mk b/solenv/gbuild/platform/macosx.mk
index fe3aa9621c0a..984621f53d10 100644
--- a/solenv/gbuild/platform/macosx.mk
+++ b/solenv/gbuild/platform/macosx.mk
@@ -101,7 +101,7 @@ gb_COMPILERNOOPTFLAGS := -O0
 # ObjCxxObject class
 
 define gb_ObjCxxObject__command
-$(call gb_Output_announce,$(2),$(true),OCX,3)
+$(call gb_Output_announce,$(2).mm,$(true),OCX,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && \
 	$(gb_CXX) \
@@ -120,7 +120,7 @@ endef
 # ObjCObject class
 
 define gb_ObjCObject__command
-$(call gb_Output_announce,$(2),$(true),OCC,3)
+$(call gb_Output_announce,$(2).m,$(true),OCC,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && \
 	$(gb_CC) \