diff --git a/apps/Makefile.am b/apps/Makefile.am
index ad5c0a44b1..0b1a6e4a1d 100644
--- a/apps/Makefile.am
+++ b/apps/Makefile.am
@@ -7,15 +7,15 @@ bin_PROGRAMS = upper_case concat 1sec
 
 upper_case_SOURCES = upper_case.cpp
 upper_case_CXXFLAGS = $(PTHREAD_CFLAGS)
-upper_case_LDFLAGS = -static-libtool-libs
+upper_case_LDFLAGS = -static-libtool-libs $(PTHREAD_CFLAGS)
 upper_case_LDADD = $(APPLIBS)
 
 concat_SOURCES = concat.cpp
 concat_CXXFLAGS = $(PTHREAD_CFLAGS)
-concat_LDFLAGS = -static-libtool-libs
+concat_LDFLAGS = -static-libtool-libs $(PTHREAD_CFLAGS)
 concat_LDADD = $(APPLIBS)
 
 1sec_SOURCES = 1sec.cpp
-1sec_CFLAGS = $(PTHREAD_CFLAGS)
-1sec_LDFLAGS = -static-libtool-libs
+1sec_CXXFLAGS = $(PTHREAD_CFLAGS)
+1sec_LDFLAGS = -static-libtool-libs $(PTHREAD_CFLAGS)
 1sec_LDADD = $(APPLIBS)