diff --git a/waflib/Tools/c.py b/waflib/Tools/c.py
index 4b8046ed..b97eee15 100644
--- a/waflib/Tools/c.py
+++ b/waflib/Tools/c.py
@@ -17,7 +17,7 @@ def c_hook(self, node):
 
 class c(Task.Task):
 	"Compile C files into object files"
-	run_str = '${CC} ${ARCH_ST:ARCH} ${CFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${CC_SRC_F}${SRC} ${CC_TGT_F}${TGT}'
+	run_str = '${CC} ${ARCH_ST:ARCH} ${CFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${CC_SRC_F}${SRC} ${CC_TGT_F}${TGT[0].abspath()}'
 	vars    = ['CCDEPS'] # unused variable to depend on, just in case
 	ext_in  = ['.h'] # set the build order easily by using ext_out=['.h']
 	scan    = c_preproc.scan
diff --git a/waflib/Tools/cxx.py b/waflib/Tools/cxx.py
index a982227a..9e1777d4 100644
--- a/waflib/Tools/cxx.py
+++ b/waflib/Tools/cxx.py
@@ -18,7 +18,7 @@ if not '.c' in TaskGen.task_gen.mappings:
 
 class cxx(Task.Task):
 	"Compile C++ files into object files"
-	run_str = '${CXX} ${ARCH_ST:ARCH} ${CXXFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${CXX_SRC_F}${SRC} ${CXX_TGT_F}${TGT}'
+	run_str = '${CXX} ${ARCH_ST:ARCH} ${CXXFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${CXX_SRC_F}${SRC} ${CXX_TGT_F}${TGT[0].abspath()}'
 	vars    = ['CXXDEPS'] # unused variable to depend on, just in case
 	ext_in  = ['.h'] # set the build order easily by using ext_out=['.h']
 	scan    = c_preproc.scan