diff --git a/configure/os/CONFIG.Common.osf-alpha b/configure/os/CONFIG.Common.osf-alpha
index 2bb9ff416..48f93851e 100644
--- a/configure/os/CONFIG.Common.osf-alpha
+++ b/configure/os/CONFIG.Common.osf-alpha
@@ -15,11 +15,13 @@ ARCH_CLASS = alpha
 
 CODE_CPPFLAGS =
 
-POSIX_CPPFLAGS =
-POSIX_LDLIBS += -lpthread
+POSIX_CPPFLAGS += -pthread -ieee
+POSIX_LDFLAGS += -pthread -ieee
 
 OP_SYS_CPPFLAGS += -D_OSF_SOURCE
 OP_SYS_LDLIBS += -lrt
+# Unknown reason why USR_SYS_LIBS += m is needed
+USR_SYS_LIBS += m
 
 space:=$(empty) $(empty)
 colon := :
diff --git a/configure/os/CONFIG.Common.osf-alpha-gnu b/configure/os/CONFIG.Common.osf-alpha-gnu
index d7207c181..758ff8ea6 100644
--- a/configure/os/CONFIG.Common.osf-alpha-gnu
+++ b/configure/os/CONFIG.Common.osf-alpha-gnu
@@ -15,10 +15,10 @@ ARCH_CLASS = alpha
 
 CODE_CPPFLAGS =
 
-POSIX_CPPFLAGS =
-POSIX_LDLIBS += -lpthread
+POSIX_CPPFLAGS += -D_REENTRANT
+POSIX_LDLIBS += -lpthread -lexc
 
-OP_SYS_CPPFLAGS += -D_OSF_SOURCE -D_REENTRANT
+OP_SYS_CPPFLAGS += -D_OSF_SOURCE
 OP_SYS_LDLIBS += -lrt
 
 space:=$(empty) $(empty)
diff --git a/configure/os/CONFIG.osf-alpha-gnu.osf-alpha-gnu b/configure/os/CONFIG.osf-alpha-gnu.osf-alpha-gnu
index e4ea45317..2fd7c5434 100644
--- a/configure/os/CONFIG.osf-alpha-gnu.osf-alpha-gnu
+++ b/configure/os/CONFIG.osf-alpha-gnu.osf-alpha-gnu
@@ -35,7 +35,7 @@ WARN_CXXFLAGS_NO =
 OPT_CXXFLAGS_YES = -O
 OPT_CXXFLAGS_NO = -g
 
-STATIC_LDFLAGS_YES= -Bstatic -lrt -lpthread
+STATIC_LDFLAGS_YES= -Bstatic
 STATIC_LDFLAGS_NO=
 STATIC_LDLIBS_YES= -Bdynamic
 STATIC_LDLIBS_NO=
diff --git a/configure/os/CONFIG.osf-alpha.osf-alpha b/configure/os/CONFIG.osf-alpha.osf-alpha
index 622f02610..4138aa8de 100644
--- a/configure/os/CONFIG.osf-alpha.osf-alpha
+++ b/configure/os/CONFIG.osf-alpha.osf-alpha
@@ -16,7 +16,7 @@ LD = -r
 
 # Configure OS vendor C compiler
 CONFORM_CFLAGS_ANSI = -std
-CONFORM_CFLAGS_STRICT = -std1 -pthread -ieee
+CONFORM_CFLAGS_STRICT = -std1
 CONFORM_CFLAGS_TRAD = -std0
 CODE_CFLAGS = 
 WARN_CFLAGS_YES =
@@ -26,7 +26,7 @@ OPT_CFLAGS_NO = -g
 
 # Configure OS vendor C++ compiler
 CONFORM_CXXFLAGS_NORMAL = 
-CONFORM_CXXFLAGS_STRICT = -std gnu -pthread -ieee
+CONFORM_CXXFLAGS_STRICT = -std gnu
 PROF_CXXFLAGS_YES = +p
 PROF_CXXFLAGS_NO =
 CODE_CXXFLAGS =