diff --git a/src/host/gprsdecode/configure.ac b/src/host/gprsdecode/configure.ac
index 8da68c803..734cbd302 100644
--- a/src/host/gprsdecode/configure.ac
+++ b/src/host/gprsdecode/configure.ac
@@ -2,6 +2,8 @@ dnl Process this file with autoconf to produce a configure script
 AC_INIT([gprsdecode], [0.0.0])
 AM_INIT_AUTOMAKE
 
+CFLAGS="$CFLAGS -std=gnu11"
+
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
diff --git a/src/host/layer23/configure.ac b/src/host/layer23/configure.ac
index 053cf58ae..85765ae48 100644
--- a/src/host/layer23/configure.ac
+++ b/src/host/layer23/configure.ac
@@ -2,6 +2,8 @@ dnl Process this file with autoconf to produce a configure script
 AC_INIT([layer23], [0.0.0])
 AM_INIT_AUTOMAKE
 
+CFLAGS="$CFLAGS -std=gnu11"
+
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
diff --git a/src/host/osmocon/configure.ac b/src/host/osmocon/configure.ac
index 556f60ba4..4195ecd76 100644
--- a/src/host/osmocon/configure.ac
+++ b/src/host/osmocon/configure.ac
@@ -5,6 +5,8 @@ AC_INIT([osmocon],
 
 AM_INIT_AUTOMAKE([dist-bzip2])
 
+CFLAGS="$CFLAGS -std=gnu11"
+
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
diff --git a/src/host/virt_phy/configure.ac b/src/host/virt_phy/configure.ac
index 97c2e1919..2a29bc8b9 100644
--- a/src/host/virt_phy/configure.ac
+++ b/src/host/virt_phy/configure.ac
@@ -3,6 +3,8 @@ AC_INIT([virtphy], 0.0.0)
 AM_CONFIG_HEADER([config.h])
 AM_INIT_AUTOMAKE([foreign dist-bzip2 subdir-objects])
 
+CFLAGS="$CFLAGS -std=gnu11"
+
 dnl kernel style compile messages
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])