diff --git a/examples/nRF51/http/boards/pca10028/armgcc/Makefile b/examples/nRF51/http/boards/pca10028/armgcc/Makefile
index cb76de49d0ae9b4f74a89beaedd16d508f9007a0..c47add34169019973221010b39481e1098a32d28 100644
--- a/examples/nRF51/http/boards/pca10028/armgcc/Makefile
+++ b/examples/nRF51/http/boards/pca10028/armgcc/Makefile
@@ -142,7 +142,7 @@ CFLAGS += -DCS_ENABLE_STDIO
 CFLAGS += -DENABLE_DEBUG_LOG_SUPPORT
 
 # Mongoose flags
-CFLAGS += -DCS_PLATFORM=CS_P_NRF52 $(MG_FEATURES_TINY) -DMG_MODULE_LINES
+CFLAGS += -DCS_PLATFORM=CS_P_NRF51 $(MG_FEATURES_TINY) -DMG_MODULE_LINES
 
 # keep every function in separate section. This will allow linker to dump unused functions
 LDFLAGS += -Xlinker -Map=$(LISTING_DIRECTORY)/$(OUTPUT_FILENAME).map
diff --git a/mongoose.h b/mongoose.h
index 4ab60471704bd1b0516c3f6056ee33856a9f6d97..94cbd49d4c92409689916c73cfed2d1beacbed50 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -103,6 +103,7 @@
 /* Amalgamated: #include "common/platforms/platform_cc3200.h" */
 /* Amalgamated: #include "common/platforms/platform_cc3100.h" */
 /* Amalgamated: #include "common/platforms/platform_mbed.h" */
+/* Amalgamated: #include "common/platforms/platform_nrf51.h" */
 /* Amalgamated: #include "common/platforms/platform_nrf52.h" */
 /* Amalgamated: #include "common/platforms/platform_wince.h" */
 /* Amalgamated: #include "common/platforms/platform_nxp_lpc.h" */